122182

Appears in sequences

• a(n) = T(2*n-1, n-1), T given by A026519.at n=9A026528
• a(n) = T(n, floor(n/2)), T given by A026519.at n=19A026530
• a(n) = T(n, floor(n/2)), where T is given by A026552.at n=19A026563
• Numbers k such that k and k^2 use only the digits 1, 2, 4, 8 and 9.at n=32A137000