Triangle read by rows: T(n,k) = n*(1+n^k)/2, 0<=k<=n.

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =3a(7) =6a(8) =15a(9) =42a(10) =4a(11) =10a(12) =34a(13) =130a(14) =514a(15) =5a(16) =15a(17) =65a(18) =315a(19) =1565a(20) =7815a(21) =6a(22) =21a(23) =111a(24) =651a(25) =3891a(26) =23331a(27) =139971a(28) =7a(29) =28