A331846 Number of compositions (ordered partitions) of n into distinct squarefree parts.

1, 1, 1, 3, 2, 3, 9, 5, 12, 16, 21, 41, 42, 49, 59, 79, 130, 231, 230, 295, 226, 495, 609, 699, 1472, 1042, 1377, 2308, 2982, 3425, 3879, 4877, 7156, 7189, 13531, 14797, 13570, 19551, 27667, 30327, 36382, 47519, 60783, 70561, 78330, 136988, 121659, 174851

Offset

0,4

Links

Table of n, a(n) for n=0..47.

Index entries for sequences related to compositions

Example

a(7) = 5 because we have [7], [6, 1], [5, 2], [2, 5] and [1, 6].

Crossrefs

Cf. A005117, A032020, A032021, A032022, A087188, A218396, A219107, A280194, A331843, A331844, A331845, A331847.

Sequence in context: A261999 A360701 A216829 * A332310 A022460 A010605

Adjacent sequences: A331843 A331844 A331845 * A331847 A331848 A331849

Keyword

nonn

Author

Ilya Gutkovskiy, Jan 29 2020

Status

approved