115351

Appears in sequences

• Odd pentagonal pyramidal numbers.at n=15A015223
• a(n) = (n+1)*(2n+1)^2.at n=30A139757
• Composite numbers m such that tau_k(m) = m for some k, where tau_k is the k-th Piltz divisor function (A077592).at n=19A327774
• Numbers p^2*q, p > q odd primes such that q divides p+1.at n=37A350245
• a(n) = (3*n - 2)^2*(3*n - 1)/2.at n=20A386906