19079424

Appears in sequences

• Squares of numbers in array formed from even elements to the right of middle of rows of Pascal triangle.at n=26A014762
• Define sds(n) = sum of the squares of the digits of n. Sequence gives smaller of two consecutive squares with sds(k^2) = sds((k+1)^2).at n=24A069645
• Number of 4Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=21A208143
• Cyclic quadrilateral numbers: numbers m = a*b*c*d such that the integers a,b,c,d are the sides of a cyclic quadrilateral whose area and circumradius are integers.at n=28A218431
• a(n) is the number of subsets of {1..n} that contain 5 even and 5 odd numbers.at n=32A331576