Duplicate of A083790.

Terms

a(0) =1a(1) =1a(2) =4a(3) =6a(4) =8a(5) =23a(6) =24a(7) =1804a(8) =1968a(9) =8375a(10) =53750a(11) =243864a(12) =639324a(13) =41381620a(14) =102621343