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A163121 (prime(n))^3-(nonprime(n))^3 . 0

%I #3 Mar 30 2012 18:52:34

%S 8,26,61,127,819,1468,3913,5131,9423,21014,25695,44821,60921,70246,

%T 93175,135053,189754,209405,281080,335959,362017,460271,535850,665665,

%U 869798,983645,1037855,1165724,1231029,1368809,1963199,2156966,2474017,2575027

%N (prime(n))^3-(nonprime(n))^3 .

%C Cube of the n-th prime, A000040(n), minus cube of the n-th nonprime, A141468(n).

%F a(n) = A030078(n)-A141468(n)^3 = A161671(n)*(A001248(n)+A000040(n)*A141468(n)+A161753(n)).

%e a(1)=2^3-0^3=8. a(2)=3^3-1^2=26. a(3)=5^3-4^3=61. a(4)=7^3-6^3=127.

%Y Cf. A000040, A030078, A141468, A161757.

%K nonn

%O 1,1

%A _Juri-Stepan Gerasimov_, Jul 21 2009

%E Extended by _R. J. Mathar_, Jul 31 2009

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)