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A083426 (4*7^n+2^n)/5. 0
1, 6, 40, 276, 1924, 13452, 94132, 658860, 4611892, 32282988, 225980404, 1581861804, 11073030580, 77511209964, 542578461556, 3798049214508, 26586344468788, 186104411215980, 1302730878380788, 9119116148403372 (list; graph; refs; listen; history; text; internal format)
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

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

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

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

MATHEMATICA

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

CROSSREFS

Sequence in context: A244253 A123357 A081016 * A122471 A178397 A090041

Adjacent sequences:  A083423 A083424 A083425 * A083427 A083428 A083429

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 30 2003

STATUS

approved

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Last modified October 15 23:54 EDT 2019. Contains 328038 sequences. (Running on oeis4.)