A306951 Number of weird numbers (A006037) below 10^n.
0, 1, 2, 7, 204, 1765, 15554, 173709, 1756426, 17270452, 172559761
Offset: 1
Examples
The only weird number below 100 is 70 which is larger than 10, thus a(1) = 0 and a(2) = 1.
Links
- S. J. Benkoski and P. Erdős, On weird and pseudoperfect numbers, Math. Comp., 28 (1974), pp. 617-623. Alternate link; 1975 corrigendum.
Extensions
a(11) from Amiram Eldar, May 26 2023
Comments