2456736

Appears in sequences

• Number of positive integers <= 2^n of form x^2 + 4 y^2.at n=24A000072
• Number T(n,k) of tilings of a 2 X n X n box using k bricks of shape 2 X 1 X 1 and 2*(n^2-k) bricks of shape 1 X 1 X 1; triangle T(n,k), n>=0, 0<=k<=n^2, read by rows.at n=23A287152