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A083200 Polynexus numbers of order 7. 9
0, 1, 17, 118, 514, 1681, 4529, 10612, 22380, 43473, 79057, 136202, 224302, 355537, 545377, 813128, 1182520, 1682337, 2347089, 3217726, 4342394, 5777233, 7587217, 9847036, 12642020, 16069105, 20237841, 25271442, 31307878, 38501009, 47021761 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
FORMULA
a(n) = ((n^7-(n-1)^7)-(n^3-(n-1)^3))/120.
G.f.: x^2*(1+10*x+20*x^2+10*x^3+x^4)/(1-x)^7. - Bruno Berselli, Feb 13 2012
MATHEMATICA
Table[((n^7 - (n - 1)^7) - (n^3 - (n - 1)^3))/120, {n, 31}] (* Bruno Berselli, Feb 13 2012 *)
CROSSREFS
Cf. A079547, A088889-A088894 (similar sequences).
Sequence in context: A196575 A003109 A066607 * A102353 A289663 A048714
KEYWORD
nonn,easy
AUTHOR
Xavier Acloque, Jun 01 2003
EXTENSIONS
More terms from David Wasserman, Oct 26 2004
Offset changed (according to the formula) from Bruno Berselli, Feb 13 2012
STATUS
approved

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)