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A141186 (1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, ...) becomes (2, 3, 5, 7^11, 13, 17*19, 23, 29^31, 37^41, 41*43, 53, 59^61*67, ...). 2

%I #10 Jan 25 2023 09:16:21

%S 2,3,5,1977326743,13,323,23,

%T 2159424054808578564166497528588784562372597429,

%U 19782022283855446341112457192300036270147066771005176357387103237,2021

%N (1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, ...) becomes (2, 3, 5, 7^11, 13, 17*19, 23, 29^31, 37^41, 41*43, 53, 59^61*67, ...).

%e a(5)=7^11=1977326743.

%e a(7)=17*19=323,

%e etc.

%Y Cf. A141287, A141261, A143678.

%K nonn,less

%O 1,1

%A _Juri-Stepan Gerasimov_, Nov 08 2008

%E More terms from _R. J. Mathar_, Apr 14 2010

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)