150040

Appears in sequences

• Numerators of continued fraction convergents to sqrt(643).at n=8A042234
• Numbers k such that sigma(sigma(k)) == phi(k) (mod sigma(k)).at n=27A067204
• a(n) = Sum_{r|n, s|n, t|n, r<s<t} r*s*t.at n=47A067817
• a(n) = 40*(200*n - 49).at n=18A157652
• Number of (n+1) X (1+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally.at n=14A232901
• a(n) = n*(n + 1)*(n + 2)*(3*n + 17)/24.at n=31A241765