A037412 n-th number k such that the set of base 2 digits of k equals the set of base 7 digits of k.

1, 49, 50, 56, 343, 344, 350, 351, 392, 393, 399, 2401, 2402, 2408, 2409, 2450, 2451, 2457, 2458, 2744, 2745, 2751, 2752, 2793, 2794, 2800, 16807, 16808, 16814, 16815, 16856, 16857, 16863, 16864, 17150, 17151, 17157, 17158