63504

Appears in sequences

• a(n) = binomial(2n, n)^2.at n=5A002894
• Permanent of "coprime?" matrix.at n=11A005326
• Square the entries of Pascal's triangle.at n=60A008459
• a(n) = Product_{j=0..5} floor((n+j)/6).at n=38A008881
• Squares of palindromes.at n=34A014186
• Squares of elements in Pascal triangle (by row) that are not 1.at n=40A014719
• Squares of even elements in Pascal's triangle A007318.at n=25A014727
• Squares of distinct elements in Pascal triangle.at n=23A014764
• Squares of even hexagonal pyramidal numbers.at n=2A014803
• a(n) = (6*n)^2.at n=42A016910
• a(n) = (7*n)^2.at n=36A016982
• a(n) = (8*n + 4)^2.at n=31A017114
• a(n) = (9*n)^2.at n=28A017162
• a(n) = (10*n + 2)^2.at n=25A017294
• a(n) = (11*n + 10)^2.at n=22A017510
• a(n) = (12*n)^2.at n=21A017522
• a(n) = binomial(n, floor(n/2))^2 = A001405(n)^2.at n=10A018224
• Numbers of form 6^i*7^j, with i, j >= 0.at n=23A025626
• First diagonal of A027447.at n=9A027451
• Squares with initial digit '6'.at n=16A045789