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A202277
Numbers m such that number of integers k such sigma(k) <= m (A074753) is equal to number of integers k <= m such that sigma(x) = k has no solution (A202276).
2
2, 537, 639, 647, 653, 655, 657, 661, 663, 672, 674, 684, 686
OFFSET
1,1
COMMENTS
Numbers m such that A074753(m) - A202276(m) = 0.
Numbers m such that A202275(m) = 0 (see graph of A202275).
Conjecture: sequence is finite with 13 terms.
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Dec 25 2011
STATUS
approved