A004281 2, 4 and the odd numbers.

1, 2, 3, 4, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 127, 129

Offset

0,2

Comments

Hilbert series of a hyperelliptic curve of genus 4 and degree 2. - Paul Barry, Aug 11 2006

Links

Table of n, a(n) for n=0..66.

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

Formula

G.f.: (1-x^10)/((1-x)^2(1-x^5)). - Paul Barry, Aug 11 2006

G.f.: 1 +2*x +3*x^2 +4*x^3 +x^4*(5-3*x)/(1-x)^2. - R. J. Mathar, May 25 2023

Mathematica

Union[{2, 4}, 2*Range[80] - 1] (* Stefan Steinerberger, Apr 09 2006 *)

Crossrefs

Sequence in context: A316268 A026285 A013930 * A004276 A033057 A092755

Adjacent sequences: A004278 A004279 A004280 * A004282 A004283 A004284

Keyword

easy,nonn

Author

N. J. A. Sloane

Extensions

More terms from Stefan Steinerberger, Apr 09 2006

Status

approved