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Indices of terms in A353730 that are powers of 2.
3

%I #11 May 19 2022 23:13:30

%S 1,2,4,9,19,79,159,319,1279,10239,20479,40959,163839,1310719,5242879,

%T 10485759

%N Indices of terms in A353730 that are powers of 2.

%C The powers of 2 appear in the order 2, 1, 4, 8, 16, ... Every power of 2 will eventually appear in A353730 (in increasing order except for the initial inversion), so the sequence is infinite.

%C a(17) >= 83886079, since A353730(20971519) = 42002 and A353730(41943039) = 60626. - _Russ Cox_, May 19 2022

%e A353730(79) = 32, so 79 is a term.

%Y Cf. A353730.

%K nonn,more

%O 1,2

%A _N. J. A. Sloane_, May 18 2022

%E a(9) from _Chai Wah Wu_, May 18 2022

%E a(10) from _Chai Wah Wu_, May 19 2022

%E a(11)-a(16) from _Russ Cox_, May 19 2022