66445

Appears in sequences

• Concatenating n with n+1 (in base 10) gives a number which is the product of 2 palindromes.at n=33A113942
• Positive numbers y such that y^2 is of the form x^2+(x+281)^2 with integer x.at n=11A157348
• G.f. satisfies A(x) = 1/(1-x) + x^4*A(x)^4.at n=17A364591