74841

Appears in sequences

• Numbers k such that sigma(k-phi(k)) = phi(k).at n=20A070170
• Fixed points of the mapping k -> abs(reverse(lpd(k))-reverse(Lpf(k))). lpd(k) is the largest proper divisor and Lpf(k) is the largest prime factor of k.at n=2A076426
• Triangle read by rows, arising in enumeration of permutations by cyclic peaks.at n=29A216962
• Triangle read by rows, related to Bell numbers A000110: A216962 interlaced with A216964.at n=53A217204
• Number of integer partitions of n such that the product of parts is greater than the sum of primes indexed by the parts.at n=44A380411