Zeroless factorials: a(0)=1; thereafter a(n) = noz(n*a(n-1)), where noz(n) = A004719(n) omits the zeros from n.

A243657

Zeroless factorials: a(0)=1; thereafter a(n) = noz(n*a(n-1)), where noz(n) = A004719(n) omits the zeros from n.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =12a(6) =72a(7) =54a(8) =432a(9) =3888a(10) =3888a(11) =42768a(12) =513216a(13) =667188a(14) =934632a(15) =141948a(16) =2271168a(17) =3869856a(18) =6965748a(19) =132349212a(20) =264698424a(21) =555866694a(22) =1222967268a(23) =28128247164a(24) =67577931936a(25) =16894482984a(26) =439256557584a(28) =332779713354a(29) =965611687266a(30) =289683561798

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