68964

Appears in sequences

• a(0)=1; a(n) = sigma_1(n) + sigma_3(n).at n=41A092345
• Area of annuli of consecutive integer thickness.at n=27A114378
• prime(n^3) - prime(n).at n=18A214612
• a(n) = n*(n^2 - 3*n + 4).at n=42A242659