A131727 Pell numbers A000129 without last digit.

1, 2, 7, 16, 40, 98, 237, 574, 1386, 3346, 8078, 19502, 47083, 113668, 274421, 662510, 1599442, 3861396, 9322235, 22505868, 54333972, 131173812, 316681596, 764537004, 1845755605, 4456048214, 10757852035, 25971752284, 62701356604

Offset

4,2

Links

Table of n, a(n) for n=4..32.

Formula

a(n)=(A000129(n)-A131711(n))/10. - R. J. Mathar, Jul 17 2009

Maple

A000129 := proc(n) option remember ; if n <= 2 then n ; else 2*A000129(n-1)+A000129(n-2) ; fi ; end: A131727 := proc(n) floor(A000129(n)/10) ; end: seq(A131727(n), n=4..40) ; # R. J. Mathar, Oct 24 2007

Crossrefs

Sequence in context: A129441 A093971 A065497 * A320236 A073371 A113224

Adjacent sequences: A131724 A131725 A131726 * A131728 A131729 A131730

Keyword

nonn,base

Author

Paul Curtz, Sep 16 2007, Sep 27 2007

Extensions

More terms from R. J. Mathar, Oct 24 2007

Status

approved