A104431 Number of ways to split 1, 2, 3, ..., 5n into n arithmetic progressions each with 5 terms.

1, 1, 2, 4, 10, 21, 59, 125, 349, 848, 2224, 5210, 15720, 37096, 98241, 245251, 684475, 1703174, 4915084, 12024901, 33594399

Offset

0,3

Links

Table of n, a(n) for n=0..20.

Crossrefs

Cf. A104429-A104430, A104432-A104443, A349430.

Sequence in context: A065023 A301700 A123445 * A130666 A179116 A358357

Adjacent sequences: A104428 A104429 A104430 * A104432 A104433 A104434

Keyword

nonn,more

Author

Jonas Wallgren, Mar 17 2005

Extensions

a(11)-a(18) from Alois P. Heinz, Dec 28 2011

a(19)-a(20) from Alois P. Heinz, Nov 18 2021

Status

approved