A054226 Number of positive integers <= 2^n of form x^2 + 11 y^2.

1, 1, 2, 2, 7, 10, 19, 34, 60, 112, 214, 400, 761, 1450, 2774, 5341, 10322, 19992, 38823, 75551, 147250, 287503, 562102, 1100266, 2155940, 4228715, 8301245, 16309119, 32064447, 63082900, 124181649, 244597440, 482026958, 950392529