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Indices of prime terms in A121217.
3

%I #6 Apr 05 2015 15:36:02

%S 2,3,10,13,21,26,34,35,47,54,61,68,77,82,91,100,109,118,127,136,137,

%T 151,156,168,181,191,201,208,209,217,240,245,262,263,278,292,299,307,

%U 320,329,339,346,367,370,379,380,405,420,433,441,446,456,461,474,488

%N Indices of prime terms in A121217.

%C A010051(A121217(a(n))) = 1; conjecture: sequence is strictly increasing. - _Reinhard Zumkeller_, Apr 05 2015

%H Reinhard Zumkeller, <a href="/A256414/b256414.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

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

%o a256414 = (+ 1) . fromJust . (`elemIndex` a121217_list) . a000040

%o -- _Reinhard Zumkeller_, Apr 05 2015

%Y Cf. A121217.

%Y Cf. A010051.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Apr 05 2015