34222500

Appears in sequences

• Numbers k such that k is a square and remains a square when its leading digit is increased by one.at n=13A067225
• a(n) = t(n)*t(n+1)*t(n+2), where t() are the triangular numbers.at n=24A071910
• a(n) = ((n-1)^2*n^2*(n+1)^2)/6 - 2*Sum_{l=2..n}Sum_{k=2..n}(n-k+1)*(n-l+1)*(k-1)*(l-1).at n=26A169801