131103

Appears in sequences

• a(n) = (1/24)*(n+1)*(3*n^3+59*n^2+358*n+648).at n=28A090949
• a(n) = 2^(n+1) + 2*n - 1.at n=16A131898
• Sum of primes dividing n-th perfect number (with repetition).at n=5A276663
• Starts of runs of 4 consecutive integers that are Jacobsthal-Niven numbers (A364216).at n=15A364219
• Odd numbers m such that at least one of the factors of Stern polynomial B(m,x) has at least one negative coefficient.at n=32A389915