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 A121721 Triangle read by rows: T[n, m] = Sum[m^3 - 3*m^2*k + 3*m*k^2 - k^3, {k, 0, n - 1}] + m^4. 0
 1, 0, 2, -1, 2, 25, -9, 1, 25, 117, -36, -7, 24, 117, 356, -100, -34, 16, 116, 356, 850, -225, -98, -11, 108, 355, 850, 1737, -441, -223, -75, 81, 347, 849, 1737, 3185, -784, -439, -200, 17, 320, 841, 1736, 3185, 5392, -1296, -782, -416, -108, 256, 814, 1728, 3184, 5392, 8586, -2025, -1294, -759, -324, 131, 750 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Table of n, a(n) for n=1..61. EXAMPLE 1 0, 2 -1, 2, 25 -9, 1, 25, 117 -36, -7, 24, 117, 356 -100, -34, 16, 116, 356, 850 MATHEMATICA g[n_, m_] = Sum[m^3 - 3*m^2*k + 3*m*k^2 - k^3, {k, 0, n - 1}] + m^4 t[n_, m_] = If[n == 0, 1, g[n, m]] a = Table[Table[t[n, m], {m, 0, n}], {n, 0, 10}] Flatten[a] CROSSREFS Sequence in context: A173252 A051502 A228690 * A173476 A281129 A136156 Adjacent sequences: A121718 A121719 A121720 * A121722 A121723 A121724 KEYWORD sign,tabl AUTHOR Roger L. Bagula, Sep 08 2006 EXTENSIONS Edited by N. J. A. Sloane, Oct 01 2006 STATUS approved

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Last modified September 26 14:24 EDT 2023. Contains 365660 sequences. (Running on oeis4.)