629802

Appears in sequences

• a(0)=1, a(n) = (3n-1)*3n*(3n+1)/2 for n>0.at n=36A157024
• Prime power Giuga numbers: composite numbers n > 1 such that -1/n + sum 1/p^k = 1, where the sum is over the prime powers p^k dividing n.at n=16A286497