Number of set partitions of [n] such that i-j is a multiple of five for all i,j belonging to the same block.
A275072
Number of set partitions of [n] such that i-j is a multiple of five for all i,j belonging to the same block.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =4a(8) =8a(9) =16a(10) =32a(11) =80a(12) =200a(13) =500a(14) =1250a(15) =3125a(16) =9375a(17) =28125a(18) =84375a(19) =253125a(20) =759375a(21) =2632500a(22) =9126000a(23) =31636800a(24) =109674240a(25) =380204032a(26) =1484258048a(27) =5794315072a(28) =22620114608a(29) =88305447412
External references
- oeis: A275072