A102637 Interleaved reading of A000578(n), A011379(n) and A027444(n).

1, 8, 27, 12, 3, 64, 36, 14, 125, 80, 39, 216, 150, 84, 343, 252, 155, 512, 392, 258, 729, 576, 399, 1000, 810, 584, 1331, 1100, 819, 1728, 1452, 1110, 2197, 1872, 1463, 2744, 2366, 1884, 3375, 2940, 2379, 4096, 3600, 2954, 4913, 4352, 3615, 5832, 5202, 4368

Offset

1,2

Links

Table of n, a(n) for n=1..50.

Formula

a(3n) = A000578(n+2), a(3n+1)=A011379(n+1), a(3n+2)=A027444(n) for n>=1. - R. J. Mathar, Feb 04 2008

Maple

A027444 := proc(n) n^3+n^2+n ; end: A011379 := proc(n) n^3+n^2 ; end: A000578 := proc(n) n^3 ; end: A102637 := proc(n) if n <= 3 then A000578(n) ; else npr := floor(n/3) ; if n mod 3 = 0 then A000578(npr+2) ; elif n mod 3 = 1 then A011379(npr+1) ; else A027444(npr) ; fi ; fi ; end: seq(A102637(n), n=1..80) ; # R. J. Mathar, Feb 04 2008

Crossrefs

Sequence in context: A356192 A367934 A053149 * A250140 A070510 A224787

Adjacent sequences: A102634 A102635 A102636 * A102638 A102639 A102640

Keyword

nonn

Author

Giovanni Teofilatto, Feb 01 2005

Extensions

Edited by R. J. Mathar, Feb 04 2008

Status

approved