56145

Appears in sequences

• Column 1 of triangle A112682; also equals row sums of A112682 (with offset).at n=15A117160
• G.f. satisfies: A(x) = Sum_{n>=0} x^n*A(x)^A001952(n), where A001952(n) = [n*(2+sqrt(2))].at n=7A190271
• Composite squarefree integers for which the sum of the squares of their factors is a square.at n=31A379780
• a(1) = 1; a(n) = 5 + n * Sum_{k=1..n-1} a(k).at n=6A383437