Duplicate of A062688.

Terms

a(0) =0a(1) =1a(2) =0a(3) =3a(4) =0a(5) =0a(6) =6a(7) =0a(8) =0a(9) =36a(10) =28a(11) =0a(12) =66a(13) =0a(14) =0a(15) =78a(16) =0a(17) =0a(18) =378a(19) =496a(20) =0a(21) =1596a(22) =0a(23) =0a(24) =8385a(25) =0a(26) =0a(27) =5778a(28) =5995a(29) =0