A145909 First 6-fold decimation of A061039. First bisection of A144454.

0, 8, 8, 16, 80, 40, 56, 224, 32, 40, 440, 176, 208, 728, 280, 320, 1088, 136, 152, 1520, 560, 616, 2024, 736, 800, 2600, 312, 336, 3248, 1160, 1240, 3968, 1408, 1496, 4760, 560, 592, 5624, 1976, 2080, 6560, 2296, 2408, 7568, 880, 920

Offset

0,2

Links

G. C. Greubel, Table of n, a(n) for n = 0..5000

Formula

a(n) = A061039(6*n+3).

Maple

A145909 := proc(n) ; A061039(6*n+3) end proc:
seq(A145909(n), n=0..80) ; # R. J. Mathar, Jan 06 2011

Mathematica

Numerator[(1/9)*(1 - 1/(2*Range[0, 75]+1)^2)] (* G. C. Greubel, Mar 08 2022 *)

Prog

(Sage) [numerator((1/9)*(1 - 1/(2*n+1)^2)) for n in (0..75)] # G. C. Greubel, Mar 08 2022

Crossrefs

Cf. A061039, A144454.

Sequence in context: A245420 A022091 A171188 * A168409 A135405 A006784

Adjacent sequences: A145906 A145907 A145908 * A145910 A145911 A145912

Keyword

nonn,easy,less

Author

Paul Curtz, Oct 24 2008

Status

approved