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 A155123 A finite irregular triangle. 1

%I #10 Feb 03 2023 08:18:07

%S 1,2,2,2,0,4,4,0,-4,8,12,0,8,-32,8,48

%N A finite irregular triangle.

%C Row sums are 1, 2, 4, 8, 16, 32.

%e {1},

%e {2},

%e {2, 2},

%e {0, 4, 4},

%e {0, -4, 8, 12},

%e {0, 8, -32, 8, 48}

%t a1 = {

%t {1},

%t {1, 1},

%t {1, 2 *n, 1},

%t {1, -1 + 2 *n + 2 n^2, -1 + 2 n + 2 n^2, 1},

%t {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},

%t {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}

%t }

%t Table[CoefficientList[Apply[Plus, a1[[m]]], n], {m, 1, Length[a1]}];

%t Flatten[%]

%Y Cf. A142463.

%K tabf,uned,sign,less,fini,full

%O 0,2

%A _Roger L. Bagula_, Jan 20 2009

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Last modified February 20 21:52 EST 2024. Contains 370219 sequences. (Running on oeis4.)