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A033505 G.f.: 1/(1-3*x-x^2+x^3). 7
1, 3, 10, 32, 103, 331, 1064, 3420, 10993, 35335, 113578, 365076, 1173471, 3771911, 12124128, 38970824, 125264689, 402640763, 1294216154, 4160024536, 13371648999, 42980755379, 138153890600, 444070778180, 1427385469761 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

N. J. A. Sloane Notes on A030186 and A033505

Index entries for linear recurrences with constant coefficients, signature (3,1,-1).

CROSSREFS

Partial sums of A030186.

Sequence in context: A278133 A077826 A273351 * A063782 A071718 A261058

Adjacent sequences:  A033502 A033503 A033504 * A033506 A033507 A033508

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Feb 13 2002

STATUS

approved

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Last modified August 23 04:06 EDT 2017. Contains 290958 sequences.