299832

Appears in sequences

• Add 1, multiply by 1, add 2, multiply by 2, etc., start with 2.at n=16A019460
• a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026780.at n=7A027249
• Numbers k such that k and k^2 use only the digits 2, 3, 4, 8 and 9.at n=28A137077