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 A155123 A finite irregular triangle. 1
 1, 2, 2, 2, 0, 4, 4, 0, -4, 8, 12, 0, 8, -32, 8, 48 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Row sums are 1, 2, 4, 8, 16, 32. LINKS Table of n, a(n) for n=0..15. EXAMPLE {1}, {2}, {2, 2}, {0, 4, 4}, {0, -4, 8, 12}, {0, 8, -32, 8, 48} MATHEMATICA a1 = { {1}, {1, 1}, {1, 2 *n, 1}, {1, -1 + 2 *n + 2 n^2, -1 + 2 n + 2 n^2, 1}, {1, -2 + 2 *n + 2 n^2 + 2 n^3, 2 - 8 n + 4 n^2 + 8 n^3, -2 + 2* n + 2 n^2 + 2 n^3, 1}, {1, -3 + 2 n + 2 n^2 + 2 n^3 + 2 n^4, 2 + 2 n - 18 n^2 + 2 n^3 + 22 n^4, 2 + 2 n - 18 n^2 + 2 n^3 + 22 n^4, -3 + 2 n + 2 n^2 + 2 n^3 + 2 n^4, 1} } Table[CoefficientList[Apply[Plus, a1[[m]]], n], {m, 1, Length[a1]}]; Flatten[%] CROSSREFS Cf. A142463. Sequence in context: A263527 A261444 A000091 * A125938 A215461 A158851 Adjacent sequences: A155120 A155121 A155122 * A155124 A155125 A155126 KEYWORD tabf,uned,sign,less,fini,full AUTHOR Roger L. Bagula, Jan 20 2009 STATUS approved

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Last modified November 29 00:31 EST 2023. Contains 367422 sequences. (Running on oeis4.)