Square array read by antidiagonals associated with sections of 1/(1-x-x^k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =4a(8) =3a(9) =1a(10) =1a(11) =8a(12) =8a(13) =4a(14) =1a(15) =1a(16) =16a(17) =21a(18) =13a(19) =5a(20) =1a(21) =1a(22) =32a(23) =55a(24) =41a(25) =19a(26) =6a(27) =1a(28) =1a(29) =64