A211358 Triangle read by rows: T(n,k) is the number of partitions up to rotation and reflection of an n-set that contain k singleton blocks.

1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 3, 1, 2, 0, 1, 3, 4, 2, 2, 0, 1, 12, 7, 11, 3, 3, 0, 1, 20, 28, 21, 16, 4, 3, 0, 1, 81, 89, 101, 43, 30, 5, 4, 0, 1, 238, 395, 356, 223, 86, 40, 7, 4, 0, 1, 1079, 1757, 1783, 1004, 504, 148, 62, 8, 5, 0, 1

Offset: 0

Author

Tilman Piesk, Apr 12 2012

Keywords

• nonn
• tabl

Links

• Tilman Piesk, Table of n, a(n) for n = 0..77