A081682 a(n) = (9^n-8^n-7^n-6^n+4*5^n)/2.

1, 4, 16, 79, 634, 7099, 83746, 947419, 10193794, 105291979, 1054581826, 10323156859, 99334276354, 943521561259, 8873286384706, 82805541911899, 768050761613314, 7089438235180939, 65182761011000386, 597402284308532539

Offset

0,2

Comments

Binomial transform of A081681.

Links

Table of n, a(n) for n=0..19.

Index entries for linear recurrences with constant coefficients, signature (35,-485,3325,-11274,15120).

Formula

G.f.: -(3603*x^4-1866*x^3+361*x^2-31*x+1)/((5*x-1)*(6*x-1)*(7*x-1)*(8*x-1)*(9*x-1)). [Colin Barker, Sep 07 2012]

Crossrefs

Cf. A081681, A081683.

Sequence in context: A362750 A356406 A009318 * A068788 A094013 A106568

Adjacent sequences: A081679 A081680 A081681 * A081683 A081684 A081685

Keyword

easy,nonn,changed

Author

Paul Barry, Mar 30 2003

Status

approved