A056817 Least inverse of A056796.
0, 1, 2, 4, 5, 11, 17, 23, 35, 70, 71, 143, 215, 430, 431, 863, 2158, 2159, 4319, 6479, 8639, 12959, 25918, 25919, 51839, 77759, 155518, 155519, 311039, 466559, 933118, 933119, 1866239, 2799359, 4478975, 5598719, 16796159
Offset: 0