The left-hand half-triangle of A185356 (or A202690).

Terms

a(0) =1a(1) =1a(2) =0a(3) =3a(4) =4a(5) =4a(6) =11a(7) =8a(8) =4a(9) =0a(10) =57a(11) =68a(12) =76a(13) =80a(14) =80a(15) =361a(16) =304a(17) =236a(18) =160a(19) =80a(20) =0a(21) =2763a(22) =3124a(23) =3428a(24) =3664a(25) =3824a(26) =3904a(27) =3904a(28) =24611a(29) =21848