Regular triangle where T(n,k) is the number of unlabeled k-uniform hypergraphs spanning n vertices.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =7a(8) =3a(9) =1a(10) =1a(11) =23a(12) =29a(13) =4a(14) =1a(15) =1a(16) =122a(17) =2102a(18) =150a(19) =5a(20) =1a(21) =1a(22) =888a(23) =7011184a(24) =7013164a(25) =1037a(26) =6a(27) =1a(28) =1a(29) =11302