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Positions of primes in sequence (A246655) of primes and prime powers {p^i, i >= 1}.
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%I #11 Aug 21 2021 15:24:22

%S 1,2,4,5,8,9,11,12,13,16,17,19,20,21,22,24,25,26,28,29,30,31,33,34,35,

%T 36,37,38,39,40,43,45,46,47,48,49,50,51,52,54,55,56,57,58,59,60,61,62,

%U 63,64,65,66,67,69,71,72,73,74,75,76,77,79,80,81,82,83,84,85,87,88,89

%N Positions of primes in sequence (A246655) of primes and prime powers {p^i, i >= 1}.

%H Ray Chandler, <a href="/A027883/b027883.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = A024620(n) - 1.

%Y Cf. A024620, A246655.

%K nonn,easy

%O 1,2

%A _N. J. A. Sloane_.

%E More terms from _Erich Friedman_.

%E Name clarified by _Ilya Gutkovskiy_, Mar 12 2020