41742

Appears in sequences

• Numbers n such that 117*2^n-1 is prime.at n=47A050584
• G.f.: exp( Sum_{n>=1} x^n/n * exp( Sum_{k>=1} binomial(2*n*k,n*k)*x^(n*k)/k ) ).at n=10A205503
• Number of partitions of n such that the number of parts having multiplicity 1 is a part or the number of distinct parts is a part.at n=42A241446
• The smallest of 3 consecutive integers such that the first is divisible by the square of a prime, the second is divisible by the cube of a prime, and the third is divisible by the fourth power of a prime.at n=29A349952
• If n is composite, replace n with the concatenation of its nontrivial divisors, written in decreasing order, each divisor being written in base 10 with its digits in reverse order, otherwise a(n) = n.at n=27A361581