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A081195 a(n) = 10*a(n-1)-24*a(n-2) for n>1, a(0)=1, a(1)=25. 1
1, 25, 226, 1660, 11176, 71920, 450976, 2783680, 17013376, 103325440, 624933376, 3769523200, 22696830976, 136499752960, 820273586176, 4926741790720, 29580851838976, 177566715412480, 1065726709989376, 6395665929994240 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (10,-24).

FORMULA

G.f.: (1+15*x)/((1-4*x)*(1-6*x)).

a(n) = 21*6^n/2 - 19*4^n/2.

MATHEMATICA

CoefficientList[Series[(1 + 15 x)/((1 - 4 x) (1 - 6 x)), {x, 0, 300}], x] (* Vincenzo Librandi, Aug 07 2013 *)

LinearRecurrence[{10, -24}, {1, 25}, 30] (* Harvey P. Dale, Apr 23 2020 *)

PROG

(MAGMA) [21*6^n/2-19*4^n/2: n in [0..25]]; // Vincenzo Librandi, Aug 07 2013

CROSSREFS

Sequence in context: A276240 A053919 A053927 * A221930 A160222 A088890

Adjacent sequences:  A081192 A081193 A081194 * A081196 A081197 A081198

KEYWORD

nonn,easy

AUTHOR

Paul Barry, Mar 11 2003

STATUS

approved

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Last modified September 19 18:37 EDT 2020. Contains 337181 sequences. (Running on oeis4.)