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Search: id:A035107
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A035107 First differences give (essentially) A028242. +0
3
3, 9, 17, 29, 44, 64, 88, 118, 153, 195, 243, 299, 362, 434, 514, 604, 703, 813, 933, 1065, 1208, 1364, 1532, 1714, 1909, 2119, 2343, 2583, 2838, 3110, 3398, 3704, 4027, 4369, 4729, 5109, 5508, 5928, 6368, 6830, 7313, 7819, 8347, 8899, 9474 (list; graph; listen)
OFFSET

0,1

FORMULA

a(n)= ( 4*n^3 +54*n^2 +212*n +153 -9*(-1^n) )/48.

CROSSREFS

Cf. A028242, A004652, A035104, A035106.

Adjacent sequences: A035104 A035105 A035106 this_sequence A035108 A035109 A035110

Sequence in context: A014209 A057258 A018466 this_sequence A090262 A006459 A049778

KEYWORD

nonn

AUTHOR

njas

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Last modified October 15 20:12 EDT 2008. Contains 145099 sequences.


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