Number of partitions of an n-set into blocks of size > 4.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =127a(11) =463a(12) =1255a(13) =3004a(14) =6722a(15) =140570a(16) =1039260a(17) =5371627a(18) =23202077a(19) =90048525a(20) =814737785a(21) =7967774337a(22) =62895570839a(23) =417560407223