145493

Appears in sequences

• a(n) = Sum_{k=0..n} T(n,k) * T(n,2n-k), with T given by A027113.at n=9A027135
• a(n) is the least number k that A074389(k) = n.at n=28A074390
• a(n)^2 is the least possible value at the root of a binary tree of height n where all nodes hold positive squares and all interior nodes also equal the sum of their two children.at n=20A309167