5271616

Appears in sequences

• Squares of even octagonal numbers.at n=14A014794
• Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change +-(.,.) 0,0 0,2 or 1,1.at n=11A264111
• Powerful numbers (A001694) whose sum of powerful divisors (including 1) is also powerful.at n=32A349109