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A051147 Smallest m such that A051145(m) = 2^n. 3

%I

%S 1,2,3,5,9,12,17,29,45,81,105,177,245,323,569,893,1277,2121,3221,4853,

%T 7697,11015,15333,25841,40157,59213,84239,135107,184679,265277,445029

%N Smallest m such that A051145(m) = 2^n.

%F A051145(a(n)) = 2^n. - _Reinhard Zumkeller_, Jul 05 2014

%o (Haskell)

%o import Data.List (elemIndex); import Data.Maybe (fromJust)

%o a051147 = fromJust . (`elemIndex` a051145_list) . (2 ^)

%o -- _Reinhard Zumkeller_, Jul 05 2014

%Y Cf. A000079, A051145, subsequence of A244747.

%K nonn,easy,nice

%O 0,2

%A _N. J. A. Sloane_, E. M. Rains

%E More terms from Larry Reeves (larryr(AT)acm.org), Oct 03 2000

%E a(21)-a(23) from _Reinhard Zumkeller_, Jul 05 2014

%E Definition corrected by _Reinhard Zumkeller_, Jul 05 2014

%E a(24)-a(30) from _Charlie Neder_, Oct 12 2018

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Last modified May 19 17:48 EDT 2019. Contains 323395 sequences. (Running on oeis4.)