Triangle read by rows, T(n, k) = A000262(n) - A349776(n, n - k) for n > 0 and T(0, 0) = 1.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =3a(6) =0a(7) =1a(8) =7a(9) =13a(10) =0a(11) =1a(12) =13a(13) =49a(14) =73a(15) =0a(16) =1a(17) =21a(18) =141a(19) =381a(20) =501a(21) =0a(22) =1a(23) =31a(24) =331a(25) =1531a(26) =3331a(27) =4051a(28) =0a(29) =1