2033476

Appears in sequences

• Squares of even pentagonal numbers.at n=15A014770
• Squares of pentagonal numbers: a(n) = (1/4)*n^2*(3*n-1)^2.at n=31A100255
• a(n) = A001609(n)^2, where g.f. of A001609 is x*(1+3*x^2)/(1-x-x^3).at n=18A218439