A280883 Number of set partitions of [n] into exactly five blocks where sizes of distinct blocks are coprime.

1, 15, 35, 630, 126, 6930, 9570, 202455, 35035, 3612609, 361725, 25350780, 50620220, 1262865060, 15864468, 33652405845, 942571665, 68217941715, 72924794635, 7281932609490, 364040548850, 111203641740750, 79780936522950, 2097251547484275, 471615091340211

Offset: 5

Author

Alois P. Heinz, Jan 09 2017

Keywords

• nonn

Links

• Wikipedia, Coprime integers
• Wikipedia, Partition of a set

Crossrefs

Column k=5 of A280880.