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A275172
Positions of 3 in A274640.
8
2, 5, 16, 25, 33, 40, 78, 89, 158, 172, 221, 237, 376, 395, 415, 523, 570, 749, 777, 790, 876, 923, 1016, 1114, 1182, 1303, 1341, 1473, 1512, 1754, 1839, 1970, 2105, 2267, 2315, 2488, 2538, 2957, 3012, 3204, 3262, 3467, 3527, 3646, 3983, 4110, 4276, 4744, 4815
OFFSET
1,1
FORMULA
A274640(a(n)) = 3.
KEYWORD
nonn
AUTHOR
Zak Seidov, Jul 19 2016
STATUS
approved