77418

Appears in sequences

• Integers k such that 10^k - 33 is prime.at n=29A108364
• Larger members of primitive phi-amicable pairs.at n=23A121249
• Composite numbers such that the square root of the sum of squares of their prime factors is a prime.at n=27A134607
• a(n) = n*(2*n^2 + 5*n + 3).at n=33A163815
• Expansion of Sum_{k>=0} x^(k*(k+1)) / Product_{j=1..k} (1 - x^j)^j.at n=49A306664