a(n) = A173675(A025487(n)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =1a(5) =8a(6) =1a(7) =14a(8) =72a(9) =1a(10) =20a(11) =22a(12) =584a(13) =1a(14) =62a(15) =32a(16) =4016a(17) =1a(18) =132a(19) =16880a(20) =44a(21) =45696a(22) =276a(23) =24656a(24) =1a(25) =336a(26) =413484a(27) =58a(28) =11323440a(29) =1006