A147996 a(n) = 9^n-8^n-7^n-6^n-5^n-4^n-3^n-2^n-1.

-7, -27, -123, -567, -2211, -2727, 84477, 1485513, 18362109, 200535993, 2059226877, 20397799593, 197430536829, 1880870895513, 17715781956477, 165457407809673, 1535334245693949, 14175044463955833, 130346379428513277

Offset

1,1

Links

Table of n, a(n) for n=1..19.

Index entries for linear recurrences with constant coefficients, signature (45,-870,9450,-63273,269325,-723680,1172700,-1026576,362880).

Formula

G.f.: x*(945936*x^8-2126232*x^7+1934792*x^6-942732*x^5+271467*x^4-47628*x^3+4998*x^2-288*x+7)/((x-1)*(2*x-1)*(3*x-1)*(4*x-1)*(5*x-1)*(6*x-1)*(7*x-1)*(8*x-1)*(9*x-1)). - Colin Barker, Oct 29 2012

Mathematica

lst={}; Do[p=9^n-8^n-7^n-6^n-5^n-4^n-3^n-2^n-1^n; AppendTo[lst, p], {n, 0, 5!}]; lst

Crossrefs

Cf. A147975-A147979.

Sequence in context: A201380 A327623 A269070 * A267365 A034536 A283538

Adjacent sequences: A147993 A147994 A147995 * A147997 A147998 A147999

Keyword

sign,easy

Author

Vladimir Joseph Stephan Orlovsky, Nov 19 2008

Status

approved