A022478 Number of 2's in n-th term of A006711.
0, 0, 1, 1, 1, 1, 2, 4, 8, 6, 10, 9, 14, 16, 21, 28, 38, 45, 69, 86, 123, 157, 210, 280, 363, 480, 622, 818, 1104, 1453, 1940, 2567, 3421, 4534, 5996, 7992, 10590, 14005, 18596, 24707, 32784, 43361, 57566, 76449, 101457, 134506, 178495, 237051
Offset: 1
Extensions
More terms from Sean A. Irvine, May 15 2019