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A083426

a(n) = (4*7^n+2^n)/5.

1, 6, 40, 276, 1924, 13452, 94132, 658860, 4611892, 32282988, 225980404, 1581861804, 11073030580, 77511209964, 542578461556, 3798049214508, 26586344468788, 186104411215980, 1302730878380788, 9119116148403372

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OFFSET

0,2

COMMENTS

Binomial transform of A083066.

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (9,-14)

FORMULA

G.f.: (1-3*x)/((1-2*x)*(1-7*x)).

E.g.f.: (4*exp(7*x)+exp(2*x))/5.

MATHEMATICA

LinearRecurrence[{9, -14}, {1, 6}, 20] (* Harvey P. Dale, Oct 13 2015 *)

CROSSREFS

Cf. A083066.

Sequence in context: A081016 A390456 A388138 * A122471 A178397 A090041

Adjacent sequences: A083423 A083424 A083425 * A083427 A083428 A083429

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 30 2003

STATUS

approved

URL: https://oeis.org/A083426

⇱ A083426 - OEIS