A triangle of numbers related to triangle A030528; array a(n,m), read by rows (1 <= m <= n).

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =3a(5) =1a(6) =0a(7) =3a(8) =6a(9) =1a(10) =0a(11) =0a(12) =15a(13) =10a(14) =1a(15) =0a(16) =0a(17) =15a(18) =45a(19) =15a(20) =1a(21) =0a(22) =0a(23) =0a(24) =105a(25) =105a(26) =21a(27) =1a(28) =0a(29) =0