a(n) = n' = derivative of n: a(0) = a(1) = 0, a(prime) = 1, a(mn) = m*a(n) + n*a(m).
0, 0, 1, 1, 4, 1, 5, 1, 12, 6, 7, 1, 16, 1, 9, 8, 32, 1, 21, 1, 24, 10, 13, 1, 44, 10, 15, 27
3 seqfan posts
Sun Jun 26 20:50:01 CEST 2011 [seqfan] Re: degree of integer
Sun Jun 26 16:06:53 CEST 2011 [seqfan] Re: degree of integer
Sat Jun 25 13:49:40 CEST 2011 [seqfan] degree of integer
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
.