A381659 Index where n first appears in A381658.
1, 4, 11, 21, 31, 69, 93, 96, 174, 222, 263, 433, 529, 633, 671, 732, 1006, 1298, 1388, 1519, 1688, 1813, 2018, 2220, 2507, 2788, 3601, 3949, 4155, 4498, 4612, 4792, 5018, 5476, 5864, 6165, 6391, 6611, 8402, 9173, 9527, 10388, 10727, 11379, 11834, 12045, 12684, 13116, 13552, 14038, 14974, 15340, 15988, 16301, 16994, 18426, 19514, 20372, 21366, 22953
Offset: 1