855625

Appears in sequences

• Crystal ball sequence for D_4 lattice.at n=21A007204
• Squares of odd pentagonal numbers.at n=12A014769
• Numbers that are the sum of 2 nonzero squares in exactly 7 ways.at n=15A025290
• Numbers that are the sum of 2 distinct nonzero squares in exactly 7 ways.at n=18A025308
• Squares of pentagonal numbers: a(n) = (1/4)*n^2*(3*n-1)^2.at n=25A100255
• Numbers k such that (65*k)^2 can be represented in exactly 4 ways as the sum of a positive square and a positive fourth power.at n=17A346594
• Odd squares k for which A379113(k) > 1, i.e., k that have a proper unitary divisor d > 1 such that A048720(A065621(sigma(d)),sigma(k/d)) is equal to sigma(k).at n=13A379121