Triangle read by rows, T(n,k) n>=0, k>=0, generalization of A000255.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =4a(5) =1a(6) =11a(7) =21a(8) =9a(9) =1a(10) =53a(11) =128a(12) =78a(13) =16a(14) =1a(15) =309a(16) =905a(17) =710a(18) =210a(19) =25a(20) =1a(21) =2119a(22) =7284a(23) =6975a(24) =2680a(25) =465a(26) =36a(27) =1a(28) =16687a(29) =65821