Number of set partitions of [3n] into n subsets of size three such that all element sums are triangular numbers.
A295946
Number of set partitions of [3n] into n subsets of size three such that all element sums are triangular numbers.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =17a(5) =149a(6) =1439a(7) =16993a(8) =373393a(9) =6899469a(10) =214746442a(11) =7287992421a(12) =249604374488
External references
- oeis: A295946