A000012 * A122890.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =1a(8) =3a(9) =5a(10) =1a(11) =1a(12) =3a(13) =15a(14) =14a(15) =1a(16) =1a(17) =3a(18) =23a(19) =84a(20) =42a(21) =1a(22) =1a(23) =3a(24) =27a(25) =244a(26) =466a(27) =132a(28) =1a(29) =1