0,3

In general for k-th level factorials a(n) =Product of first n (k-1)-th level factorials =Product[i^C(n-i+k-1,n-i)] over 1<=i<=n

a(n) =a(n-1)*A057527(n) =Product[i^A000292(n-i+4)] over 1<=i<=n

Cf. A000142, A000178, A055462, A057527 for first, second, third and fourth level factorials.

Sequence in context: A122222 A036980 A091810 this_sequence A132206 A138082 A139884

Adjacent sequences: A057525 A057526 A057527 this_sequence A057529 A057530 A057531

easy,nonn

Henry Bottomley (se16(AT)btinternet.com), Sep 02 2000