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 A154786 Row sums of triangle in A154725. 6
 0, 0, 0, 8, 10, 12, 14, 32, 36, 40, 44, 72, 52, 56, 90, 64, 102, 144, 38, 120, 168, 132, 138, 240, 200, 156, 270, 168, 174, 360, 124, 320, 396, 136, 350, 432, 296, 380, 546, 320, 328, 672, 344, 352, 810, 368, 376, 672, 294, 600, 816, 520, 530, 864, 660, 784, 1140 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS Table of n, a(n) for n=1..57. FORMULA a(n) = A154785(n) - n. a(n) = A005843(n)*A061357(n). - Omar E. Pol, Jan 20 2009 MAPLE A154786 := proc(n) local a, d; a := 0 ; for d from 1 to n-2 do if isprime(n-d) and isprime(n+d) then a := a+2*n; fi; od: a ; end: for n from 1 to 80 do printf("%d, ", A154786(n)) ; od: # R. J. Mathar, Jan 18 2009 CROSSREFS Cf. A154724, A154725, A154726, A154727, A154783, A154784, A154785. Cf. A005843, A061357, A154720, A154787. - Omar E. Pol, Jan 20 2009 Sequence in context: A161425 A096171 A337252 * A335013 A249628 A352169 Adjacent sequences: A154783 A154784 A154785 * A154787 A154788 A154789 KEYWORD easy,nonn AUTHOR Omar E. Pol, Jan 15 2009, Jan 16 2009 EXTENSIONS Edited by Omar E. Pol, Jan 17 2009 Extended by R. J. Mathar, Jan 18 2009 STATUS approved

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Last modified July 15 11:27 EDT 2024. Contains 374332 sequences. (Running on oeis4.)