A031092 Position of n-th 4 in A031087.
4, 17, 35, 53, 64, 66, 68, 70, 71, 72, 74, 76, 78, 80, 89, 107, 125, 143, 165, 192, 219, 246, 262, 265, 268, 271, 273, 274, 277, 280, 283, 286, 300, 327, 354, 381, 408, 435, 462, 489, 505, 508, 511, 514, 516, 517, 520, 523, 526
Offset: 1