References to A068970

Sum(phi(d^4)); d|n.
1, 9, 55, 137, 501, 495, 2059, 2185, 4429, 4509, 13311, 7535, 26365, 18531, 27555

1 seqfan posts

Thu Feb 12 12:14:04 CET 2009    [seqfan] Sequence to A141530
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 .