Number of set partitions of [n] where all prime-indexed blocks are not singletons.
A332248
Number of set partitions of [n] where all prime-indexed blocks are not singletons.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =15a(6) =60a(7) =286a(8) =1423a(9) =7185a(10) =37758a(11) =212596a(12) =1293577a(13) =8415869a(14) =57715274a(15) =414520958a(16) =3125102795a(17) =24880061105a(18) =209909409566
External references
- oeis: A332248