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%I #6 Jul 01 2019 22:57:17
%S 17,18,22,26,27,28,32,33,38,39,45,46,52,59,60,76,101,108,118,124,128,
%T 130,146,153,158,159,160,166,172,174,176,184,185,186,188,189,191,192,
%U 193,199,206,218,236,286,292,296,298,302,326,332,333,339,344,345,350,358,364,370,372,382,383,389,390,396,397
%N Positions of 3's on the spiral defined in A308884.
%Y Cf. A308884-A308895.
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Jul 01 2019
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