A237519 - OEIS

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A237519

Triangle read by rows: T(n,k), n>=1, k>=1, in which column k lists the partial sums of the column k of A237273 starting in row k^2.

1, 4, 8, 13, 2, 19, 2, 26, 7, 34, 7, 43, 13, 53, 13, 3, 64, 20, 3, 76, 20, 3, 89, 28, 10, 103, 28, 10, 118, 37, 10, 134, 37, 18, 151, 47, 18, 4, 169, 47, 18, 4, 188, 58, 27, 4, 208, 58, 27, 4, 229, 70, 27, 13, 251, 70, 37, 13, 274, 83, 37, 13, 298, 83, 37, 13, 323, 97, 48, 23, 349, 97, 48, 23, 5

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

The sum of row n is A024916(n), the sum of all divisors of all positive integers <= n.

Row n has length A000196(n).

Column 1 is A034856.

Column 2 lists the elements of A155212 repeated.

Column 3 lists the elements of A051938 repeated with three copies of every element.

Column k contains k copies of every element.

LINKS

Table of n, a(n) for n=1..75.

EXAMPLE

Triangle begins:

13, 2;

19, 2;

26, 7;

34, 7;

43, 13;

53, 13, 3;

64, 20, 3;

76, 20, 3;

89, 28, 10;

103, 28, 10;

118, 37, 10;

134, 37, 18;

151, 47, 18, 4;

169, 47, 18, 4;

188, 58, 27, 4;

208, 58, 27, 4;

229, 70, 27, 13;

251, 70, 37, 13;

274, 83, 37, 13;

298, 83, 37, 13;

323, 97, 48, 23;

349, 97, 48, 23, 5;

...

CROSSREFS

Cf. A000203, A000196, A024916, A034856, A051938, A155212, A236104, A235791, A237273.

Sequence in context: A061517 A297555 A058759 * A311665 A032474 A311666

Adjacent sequences: A237516 A237517 A237518 * A237520 A237521 A237522

KEYWORD

nonn,tabf

AUTHOR

Omar E. Pol, Feb 08 2014

STATUS

approved