A030378 Least k such that base 4 representation of n begins at s(k), where s=A030373.
1, 2, 3, 4, 6, 1, 10, 12, 9, 16, 2, 20, 3, 11, 19, 28, 4, 34, 37, 33, 6, 7, 49, 52, 8, 15, 1, 64, 50, 10, 73, 76, 53, 12, 85, 36, 48, 14, 9, 84, 59, 16, 17, 112, 2, 110, 18, 124, 65, 113, 20, 3, 39, 51, 22, 11, 71, 99, 24, 19, 26, 74, 122, 172
Offset: 1