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 A016999 a(n) = (7*n + 1)^7. 1
 1, 2097152, 170859375, 2494357888, 17249876309, 78364164096, 271818611107, 781250000000, 1954897493193, 4398046511104, 9095120158391, 17565568854912, 32057708828125, 55784660123648 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..10000 Index entries for linear recurrences with constant coefficients, signature (8, -28, 56, -70, 56, -28, 8, -1). FORMULA G.f.: (1 + 2097144*x + 154082187*x^2 + 1186203088*x^3 + 1961635263*x^4 + 785850072*x^5 + 60509029*x^6 + 279936*x^7)/(-1+x)^8. - R. J. Mathar, Jun 24 2009 a(n) = 8*a(n-1) - 28*a(n-2) + 56*a(n-3) - 70*a(n-4) + 56*a(n-5) - 28*a(n-6) + 8*a(n-7) - a(n-8). - Wesley Ivan Hurt, Jun 26 2022 MATHEMATICA (7*Range[0, 20]+1)^7 (* or *) LinearRecurrence[{8, -28, 56, -70, 56, -28, 8, -1}, {1, 2097152, 170859375, 2494357888, 17249876309, 78364164096, 271818611107, 781250000000}, 20] (* Harvey P. Dale, Sep 25 2020 *) PROG (Magma) [(7*n+1)^7: n in [0..20]]; // Vincenzo Librandi, Jul 13 2011 CROSSREFS Sequence in context: A195236 A068345 A194935 * A017071 A017263 A017371 Adjacent sequences: A016996 A016997 A016998 * A017000 A017001 A017002 KEYWORD nonn,easy AUTHOR N. J. A. Sloane STATUS approved

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Last modified September 23 11:05 EDT 2023. Contains 365544 sequences. (Running on oeis4.)