86142

Appears in sequences

• A triangular array related to A077028 and distributing the values of A007582.at n=59A110552
• 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=14A286497
• Ulam numbers that are oblong (or promic) numbers.at n=22A379828