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

Author

Paul Curtz, Oct 24 2008

Keywords

• nonn
• easy
• less

Links

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

Crossrefs

Cf. A061039, A144454.

Programs

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 *)

Sage

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

Formula

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