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%I #10 Dec 27 2021 10:38:45
%S 1,3,7,13,21,31,43,57,73,91,110,131,154,179,206,235,266,299,334,370,
%T 408,448,490,534,580,628,678,730,783,838,895,954,1015,1078,1143,1210,
%U 1279,1350,1422,1496,1572,1650,1730,1812,1896,1982,2070,2159,2250,2343,2438
%N Index of 8^n within sequence of numbers of form 3^i*8^j (A025615).
%F A025615(a(n)) = 8^(n-1). - _Bernard Schott_, Dec 27 2021
%Y Cf. A025615, A025699 (similar for 3^n).
%K nonn
%O 1,2
%A _David W. Wilson_
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