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A164828 Generalized Fibonacci numbers. 0
1, 1, 11, 120, 122, 1331, 1462, 15960, 17413, 190081, 207503, 2265120, 2472614, 26991251, 29463874, 321630000, 351093865, 3832568641, 4183662515, 45669193800, 49852856306, 544197756851, 594050613166, 6484703888520, 7078754501677, 77272248905281 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..26.

Index to sequences with linear recurrences with constant coefficients, signature (0,11,0,11,0,-1).

FORMULA

For n odd a(n) = 11a(n-2) + a(n-3), for n even a(n) = 11a(n-1)- a(n-3); with a(1,2) = 1 (For Fibonacci sequence: factor 2 instead of 11).

G.f.: x*(1+x+109*x^3-10*x^4)/((1+x^2)*(1-12*x^2+x^4)). [Colin Barker, Jul 27 2012]

MATHEMATICA

LinearRecurrence[{0, 11, 0, 11, 0, -1}, {1, 1, 11, 120, 122, 1331}, 30] (* Harvey P. Dale, Jun 14 2014 *)

CROSSREFS

Cf. A000045, A041059.

Sequence in context: A125468 A163447 A060499 * A060498 A171316 A081122

Adjacent sequences:  A164825 A164826 A164827 * A164829 A164830 A164831

KEYWORD

nonn,easy

AUTHOR

M. Dols (markdols99(AT)yahoo.com), Aug 27 2009

EXTENSIONS

More terms from Harvey P. Dale, Jun 14 2014

STATUS

approved

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Last modified November 24 15:00 EST 2014. Contains 249899 sequences.