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A055518 a_{k+1} = 6*a_k + 11*a_{k-1} - 19*a_{k-2} - 4*a_{k-3} + a_{k-4}, a_1=1, a_2=2, a_3=19, a_4=118, a_5=875. 3
1, 2, 19, 118, 875, 6180, 44389, 317236, 2270893, 16247718, 116267271, 831957002, 5953209015, 42598982984, 304823192665, 2181205436792, 15607926184313, 111684733527034, 799175992102923, 5718617425358462, 40920380028968819 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..21.

Index to sequences with linear recurrences with constant coefficients, signature (6,11,-19,-4,1).

FORMULA

a(n) = Sum_{k=1..n} Fibonacci(k)^4*a(n-k), a(0)=1. - Vladeta Jovovic, Apr 23 2003

CROSSREFS

Cf. A054894, A055519.

Sequence in context: A240124 A101253 A082291 * A249690 A206948 A089364

Adjacent sequences:  A055515 A055516 A055517 * A055519 A055520 A055521

KEYWORD

easy,nonn

AUTHOR

Barry Cipra, Jul 04 2000

STATUS

approved

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Last modified November 23 09:53 EST 2014. Contains 249840 sequences.