Number of set partitions of [n] such that the difference between each element and its block index is a multiple of eight.
A274841
Number of set partitions of [n] such that the difference between each element and its block index is a multiple of eight.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =2a(10) =3a(11) =4a(12) =5a(13) =6a(14) =7a(15) =8a(16) =9a(17) =19a(18) =38a(19) =73a(20) =136a(21) =247a(22) =438a(23) =757a(24) =1268a(25) =3303a(26) =7883a(27) =17801a(28) =38745a(29) =82179
External references
- oeis: A274841