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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 Bruno Berselli, Table of n, a(n) for n = 1..1000 Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1). 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 Adjacent sequences:  A083197 A083198 A083199 * A083201 A083202 A083203 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 January 21 00:46 EST 2022. Contains 350473 sequences. (Running on oeis4.)