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A152110
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G.f.: -2*(-2-11*x-4*x^2+x^3)/(x-1)^4.
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1
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4, 38, 136, 330, 652, 1134, 1808, 2706, 3860, 5302, 7064, 9178, 11676, 14590, 17952, 21794, 26148, 31046, 36520, 42602, 49324, 56718, 64816, 73650, 83252, 93654, 104888, 116986, 129980, 143902, 158784, 174658, 191556, 209510, 228552, 248714
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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FORMULA
| a(n)= 4*a(n-1) -6*a(n-2) +4*a(n-3) -a(n-4). a(n) = 2*(n+1)*(8*n^2+8*n+3)/3 = A152133(2*n-1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 22 2009]
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CROSSREFS
| Cf. A006071.
Sequence in context: A020205 A003633 A129310 * A196851 A196702 A196945
Adjacent sequences: A152107 A152108 A152109 * A152111 A152112 A152113
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane, Sep 21 2009, based on email from R. J. Mathar, Mar 22 2009
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 22 2009
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