A054184 Number of positive integers <= 2^n of form 6 x^2 + 9 y^2.

0, 0, 0, 1, 3, 4, 10, 15, 30, 51, 97, 177, 334, 621, 1182, 2243, 4278, 8203, 15779, 30446, 58882, 114125, 221636, 431155, 840041, 1638853, 3201255, 6259884, 12253156, 24006205, 47072013, 92370614, 181390365, 356434492, 700827326