a(0) = 1, a(n) = n*a(n-1)*A014963(n).
1, 1, 4, 36, 288, 7200, 43200, 2116800, 33868800, 914457600, 9144576000
3 seqfan posts
Thu Aug 19 17:02:49 CEST 2010 [seqfan] Re: Definition of sigma(n) which are powers, A180162
Wed Aug 18 21:26:06 CEST 2010 [seqfan] Re: Definition of sigma(n) which are powers, A180162
Wed Aug 18 20:41:07 CEST 2010 [seqfan] Definition of sigma(n) which are powers, A180162
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
Links to OEIS content are included according to
The OEIS End-User License Agreement
.