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

Author

Paul Curtz, Sep 16 2007, Sep 27 2007

Keywords

• nonn
• base

Programs

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

Formula

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

Extensions

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