STATUS
proposed
approved
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Revision History for A288639
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing entries 1-10 | older changes
Products of two distinct numbers that are the average of a pair of twin primes.
(history; published version)
(history; published version)
STATUS
editing
proposed
CROSSREFS
Subset of A286195.
STATUS
proposed
editing
STATUS
editing
proposed
EXAMPLE
4 and 12 are two distinct numbers that are averages of twin prime pairs (i.e., 4 = (3+5)/2 and 12 = (11+13)/2), and 4*12 = 48, which is in the sequence.
STATUS
proposed
editing
STATUS
editing
proposed
DATA
24, 48, 72, 108, 120, 168, 180, 216, 240, 252, 288, 360, 408, 432, 504, 540, 552, 600, 612, 648, 720, 756, 768, 792, 828, 864, 900, 912, 960, 1080, 1128, 1152, 1188, 1224, 1248, 1260, 1296, 1368, 1392, 1440, 1620, 1656, 1680, 1692, 1728, 1800, 1836, 1848
MATHEMATICA
m = 1 + Select[Range@1000, PrimeQ[#] && PrimeQ[# + 2] &]; Select[v Union@ Flatten@ Table[m[[i]] m[[j]], {i, Length[m]}, {j, i - 1}], # <= 4000 &] (* Giovanni Resta, Jun 13 2017 *)
KEYWORD
nonn,more,changed
EXTENSIONS
More terms from Giovanni Resta, Jun 13 2017
STATUS
proposed
editing
STATUS
editing
proposed
NAME
Products of two unique distinct numbers that are the average of a pair of twin primes.
EXAMPLE
4 and 12 are two unique distinct numbers that are averages of twin prime pairs (i.e., 4=(3+5)/2 and 12 = (11+13)/2), and 4*12 = 48, which is in the sequence.
STATUS
proposed
editing
STATUS
editing
proposed