28198

Appears in sequences

• Number of strings of n distinct digits from 1-9 that are the last n digits of a square in base 10.at n=7A036756
• a(n) = (n^3 - 2*n^2 + 3*n + 2)/2.at n=39A189890
• Number of lower triangles of a 4 X 4 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less.at n=12A195234