Number of set partitions of [n] such that the difference between each element and its index (in the partition) is a multiple of nine.

A274866

Number of set partitions of [n] such that the difference between each element and its index (in the partition) is a multiple of nine.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =16a(6) =32a(7) =64a(8) =128a(9) =256a(10) =512a(11) =1024a(12) =2048a(13) =4096a(14) =8192a(15) =16384a(16) =32768a(17) =65536a(18) =131072a(19) =262400a(20) =525312a(21) =1051648a(22) =2105344a(23) =4214784a(24) =8437760a(25) =16891904a(26) =33816576a(27) =67698688a(28) =135726080a(29) =272175872

External references