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A136740 (0, 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, 41^43, 47*53, 59, 61^67*71,..). 4

%I #9 Mar 01 2021 06:33:45

%S 2,3,5,7,34522712143931,17,437,29

%N (0, 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, 41^43, 47*53, 59, 61^67*71,..).

%e a(5)=11^13=34522712142931.

%e a(7)=19*23=437,

%e etc.

%Y Cf. A141269, A141270, A143652, A143653, A143666.

%K nonn,less

%O 1,1

%A _Juri-Stepan Gerasimov_, Nov 08 2008

%E Corrected typo in a(5), inserted a(6). _R. J. Mathar_, Feb 21 2009

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Last modified April 16 14:51 EDT 2024. Contains 371749 sequences. (Running on oeis4.)