91455

Appears in sequences

• Integers k such that k*28*c + 1 is prime for c = 1, 2, 4, 7 and 14.at n=26A067199
• Odd numbers k such that abs(sigma(k)-2k) <= sqrt(k). Abundance-radius = abs(sigma(k)-2k) does not exceed square root of k and k is odd.at n=31A087415
• a(n) = (2*n+1)*(2*n+3)*(2*n+5)/3.at n=31A162540