Number of positive terms in row n of A082268.

Terms

a(0) =1a(1) =1a(2) =0a(3) =5a(4) =15a(5) =0a(6) =55a(7) =85a(8) =0a(9) =325a(10) =1021a(11) =0a(12) =3769a(13) =4657a(14) =0a(15) =21689a(16) =61139a(17) =0a(18) =245677a(19) =329385a(20) =0a(21) =1142389a(22) =3953225a(23) =0a(24) =15980975a(25) =20299329a(26) =0a(27) =75251262a(28) =253879945a(29) =0