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A027972
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T(n,2n-10), T given by A027960.
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1
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1, 4, 11, 29, 76, 199, 518, 1324, 3278, 7784, 17643, 38138, 78753, 155793, 296248, 543333, 964239, 1660748, 2783499, 4550843, 7273394, 11385571, 17485634, 26385946, 39175444, 57296576, 82639259, 117654736, 165492559
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,2
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FORMULA
| Sequence satisfies a 10-degree polynomial approximating A002878.
G.f. ( x^5*(-1+7*x-22*x^2+37*x^3-32*x^4-x^5+32*x^6-37*x^7+22*x^8-7*x^9+x^10) ) / ( (x-1)^11 ). - R. J. Mathar, Jan 30 2011
a(n) = -76 +183941*n/2520 +386899*n^3/36288 -1747657*n^2/50400 -831241*n^4/362880 +11887*n^5/34560 -5807*n^6/172800 +41*n^7/24192 +n^8/60480 -n^9/145152 +n^10/3628800. - R. J. Mathar, Jan 30 2011
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CROSSREFS
| A column of triangle A026998.
Sequence in context: A109803 A027968 A027970 * A098149 A002878 A124861
Adjacent sequences: A027969 A027970 A027971 * A027973 A027974 A027975
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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