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%I #8 May 18 2022 07:54:01
%S 1,3,6,10,15,21,28,36,45,55,66,78,91,105,120,137,155,174,194,215,237,
%T 260,284,309,335,362,390,419,449,480,513,547,582,618,655,693,732,772,
%U 813,855,898,942,987,1033,1081,1130,1180,1231,1283,1336,1390,1445,1501,1558,1616
%N Index of 8^n within sequence of numbers of form 7^i*8^j.
%Y Cf. A001018, A036566.
%K nonn
%O 1,2
%A _David W. Wilson_
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