A054152 Number of positive integers <= 2^n of form x^2 + 8 y^2.

1, 1, 2, 3, 6, 10, 18, 32, 59, 107, 202, 375, 709, 1344, 2567, 4905, 9423, 18151, 35051, 67879, 131688, 255972, 498339, 971558, 1896661, 3706983, 7252576, 14203258, 27839240, 54610355, 107204740, 210595574, 413961363, 814190153, 1602250651