PROG
(MAGMAMagma) [2*n*k + n + k - 6: k in [1..n], n in [1..11]]; // Vincenzo Librandi, Nov 21 2012
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Revision History for A155550
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing all changes.
STATUS
proposed
approved
STATUS
editing
proposed
COMMENTS
Number Numbers n such that 2n+13 is not prime.
LINKS
Vincenzo Librandi, <a href="/A155550/b155550.txt">Table of n, a(n) for Rows n = 1..5050100, flattened</a>
NAME
Triangle read by rows where T(m,n)=2mn2*m*n + m + n - 6.
DATA
-2, 1, 6, 4, 11, 18, 7, 16, 25, 34, 10, 21, 32, 43, 54, 13, 26, 39, 52, 65, 78, 16, 31, 46, 61, 76, 91, 106, 19, 36, 53, 70, 87, 104, 121, 138, 22, 41, 60, 79, 98, 117, 136, 155, 174, 25, 46, 67, 88, 109, 130, 151, 172, 193, 214, 28, 51, 74, 97, 120, 143, 166, 189, 212
COMMENTS
First column: A016777, second column: A016861, third column: A017029, fourth column: A017245. - Vincenzo Librandi, Nov 21 2012
LINKS
Vincenzo Librandi, <a href="/A155550/b155550.txt">Table of n, a(n) for n = 1..5050</a>
EXAMPLE
Triangle begins: -2; 1, 6; 4, 11, 18; 7, 16, 25, 34; 10, 21, 32, 43, 54; 13, 26, 39, 52, 65, 78; 16, 31, 46, 61, 76, 91, 106; 19, 36, 53, 70, 87, 104, 121, 138; 22, 41, 60, 79, 98, 117, 136, 155, 174; 25, 46, 67, 88, 109, 130, 151, 172, 193, 214;
Triangle begins:
-2;
1, 6;
4, 11, 18;
7, 16, 25, 34;
10, 21, 32, 43, 54;
13, 26, 39, 52, 65, 78;
16, 31, 46, 61, 76, 91, 106;
19, 36, 53, 70, 87, 104, 121, 138;
22, 41, 60, 79, 98, 117, 136, 155, 174;
25, 46, 67, 88, 109, 130, 151, 172, 193, 214; etc.
MATHEMATICA
t[n_, k_]:= 2 n*k + n + k - 6; Table[t[n, k], {n, 15}, {k, n}]//Flatten (* Vincenzo Librandi, Nov 21 2012 *)
PROG
(MAGMA) [2*n*k + n + k - 6: k in [1..n], n in [1..11]]; // Vincenzo Librandi, Nov 21 2012
STATUS
approved
editing
AUTHOR
_Vincenzo Librandi (vincenzo.librandi(AT)tin.it), _, Jan 24 2009
KEYWORD
tabl,sign,new
EXTENSIONS
Definition corrected by Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 03 2009
NAME
Triangle read by rows where T(m,n)=2mn+mnm+n-6
KEYWORD
nonn,tabl,newsign
EXTENSIONS
Definition corrected by Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 03 2009
NAME
Triangle read by rows where T(m,n)=2mn+mn-6
DATA
-2, 1, 6, 4, 11, 18, 7, 16, 25, 34, 10, 21, 32, 43, 54, 13, 26, 39, 52, 65, 78, 16, 31, 46, 61, 76, 91, 106, 19, 36, 53, 70, 87, 104, 121, 138, 22, 41, 60, 79, 98, 117, 136, 155, 174, 25, 46, 67, 88, 109, 130, 151, 172, 193, 214
OFFSET
1,1
COMMENTS
Number n such that 2n+13 is not prime.
EXAMPLE
Triangle begins: -2; 1, 6; 4, 11, 18; 7, 16, 25, 34; 10, 21, 32, 43, 54; 13, 26, 39, 52, 65, 78; 16, 31, 46, 61, 76, 91, 106; 19, 36, 53, 70, 87, 104, 121, 138; 22, 41, 60, 79, 98, 117, 136, 155, 174; 25, 46, 67, 88, 109, 130, 151, 172, 193, 214;
CROSSREFS
Cf. A153082
KEYWORD
nonn,tabl
AUTHOR
Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 24 2009
STATUS
approved