26558675

Appears in sequences

• a(n) = (8*n+9)*C(n+8,8)/9.at n=18A056122
• Column 0 of the irregular triangle A355588.at n=28A355952
• a(n) is the least number k such that sigma(sigma(k) * k) > n * sigma(k) * k.at n=6A368063