Triangle read by rows: T(n,k) is the number of k-block partitions of an n-set up to rotations.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =2a(9) =1a(10) =1a(11) =3a(12) =5a(13) =2a(14) =1a(15) =1a(16) =7a(17) =18a(18) =13a(19) =3a(20) =1a(21) =1a(22) =9a(23) =43a(24) =50a(25) =20a(26) =3a(27) =1a(28) =1a(29) =19