A104433 Number of ways to split 1, 2, 3, ..., 7n into n arithmetic progressions each with 7 terms.

1, 1, 2, 4, 10, 20, 56, 117, 323, 745, 1896, 4242, 12883, 29108, 75725, 183366, 504215, 1176776, 3335507, 7852561, 21392496, 52330546, 136872838, 329962237, 972475667, 2336609478, 6248356267, 15594732634, 42139332397, 102842293769, 285068187832, 696935560085

Offset

0,3

Links

Table of n, a(n) for n=0..31.

Crossrefs

Cf. A104429-A104432, A104434-A104443.

Sequence in context: A090246 A104442 A104434 * A104432 A355747 A349430

Adjacent sequences: A104430 A104431 A104432 * A104434 A104435 A104436

Keyword

nonn

Author

Jonas Wallgren, Mar 17 2005

Extensions

a(0), a(11)-a(17) from Alois P. Heinz, Nov 18 2020

a(18)-a(31) from Martin Fuller, Apr 10 2026

Status

approved