A131871 a(n) = A131766(n) / 18.

0, 0, 0, 0, 0, 1, 2, 3, 4, 10, 21, 32, 43, 54, 165, 276, 387, 498, 1109, 2220, 3331, 4442, 5553, 16664, 27775, 38886, 49997, 111108, 222219, 333330, 444441, 555552, 1666663, 2777774, 3888885, 4999996, 11111107, 22222218, 33333329, 44444440, 55555551, 166666662

Offset

0,7

Links

Table of n, a(n) for n=0..41.

Index entries for linear recurrences with constant coefficients, signature (2,-1,0,0,0,0,0,0,100,-200,100).

Crossrefs

Cf. A002266, A131766.

Sequence in context: A135056 A132135 A372933 * A132446 A332838 A123700

Adjacent sequences: A131868 A131869 A131870 * A131872 A131873 A131874

Keyword

nonn,easy

Author

Paul Curtz, Oct 05 2007

Extensions

a(32) corrected and more terms from Georg Fischer, Jul 31 2025

Status

approved