347900

Appears in sequences

• a(n) is the number of invertible 2 X 2 upper triangular matrices over Z_p where p = prime(n).at n=19A270775
• Exponential weird numbers: numbers that are exponential abundant (A129575) but not exponential pseudoperfect (A318100).at n=22A321146
• Coreful weird numbers: numbers k that are coreful abundant (A308053) but no subset of their aliquot coreful divisors sums to k.at n=22A339939