811801

Appears in sequences

• Squares with initial digit '8'.at n=30A045792
• Squares resulting from procedure described in A048391.at n=19A048392
• Squares composed of digits {0,1,8}, not ending with zero.at n=3A058422
• Main diagonal of A082043: a(n) = n^4 + 2*n^2 + 1.at n=30A082044
• Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 0 1 vertically.at n=5A208033
• Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 0 1 vertically.at n=5A208037
• Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 1 0 1 vertically.at n=5A208042
• Perfect squares k such that each decimal digit of k is equal to the difference of at least two other digits of k.at n=14A255893
• Rotationally ambigrammatic square numbers with no trailing zeros.at n=31A340164
• a(n) = Sum_{1 <= x_1, x_2 <= n} ( n/gcd(x_1, x_2, n) )^3.at n=15A372950