Number of partitions of an n-set without blocks of size 8.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =203a(7) =877a(8) =4139a(9) =21138a(10) =115885a(11) =677745a(12) =4206172a(13) =27577513a(14) =190289713a(15) =1377315050a(16) =10426866782a(17) =82350895629a(18) =677003941219