A023451 a(n) = n-9.

-9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51

Offset: 0

Author

N. J. A. Sloane

Keywords

• sign
• easy

Links

• Tanya Khovanova, Recursive Sequences
• Index entries for linear recurrences with constant coefficients, signature (2,-1).

Crossrefs

Cf. A256958, A001057, A000027, A001477, A023443, ..., A023450, A023452, ..., A023482, A022958, ..., A022996.

The negative of A022965.

Programs

Maple

A023451 := n -> n-9; # M. F. Hasler, Apr 18 2015

Mathematica

Range[0,60]-9 (* Harvey P. Dale, Jan 15 2015 *)

PARI

a(n)=n-9

Formula

G.f.: -(9-10*x)/(1-x)^2. - Bruno Berselli, Sep 02 2011

a(n) = 2 a(n-1) - a(n-2). a(n) = -A022965(n). - M. F. Hasler, Apr 18 2015