a(n) = denominator of Product_{k=1..n} k^mu(n+1-k), where mu(k) = A008683(k).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =20a(6) =45a(7) =14a(8) =70a(9) =864a(10) =525a(11) =880a(12) =6237a(13) =3328a(14) =3003a(15) =900a(16) =25025a(17) =60928a(18) =53703a(19) =19456a(20) =3997125a(21) =1209600a(22) =3556553a(23) =30912a(24) =67643667a(25) =11264000a(26) =244375a(27) =26687232a(28) =52055003a(29) =2702336