Triangle read by rows: T(n,k) is the number of partitions of an n-set having k singleton blocks (0<=k<=n).

A124323

Triangle read by rows: T(n,k) is the number of partitions of an n-set having k singleton blocks (0<=k<=n).

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =1a(7) =3a(8) =0a(9) =1a(10) =4a(11) =4a(12) =6a(13) =0a(14) =1a(15) =11a(16) =20a(17) =10a(18) =10a(19) =0a(20) =1a(21) =41a(22) =66a(23) =60a(24) =20a(25) =15a(26) =0a(27) =1a(28) =162a(29) =287

External references