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A351367 a(n) = Sum_{p|n, p prime} p^nextprime(p), where nextprime(n) is the smallest prime > n. 0

%I #5 Feb 08 2022 21:34:45

%S 0,8,243,8,78125,251,1977326743,8,243,78133,34522712143931,251,

%T 8650415919381337933,1977326751,78368,8,239072435685151324847153,251,

%U 257829627945307727248226067259,78133,1977326986,34522712143939,3091058643093537522799545838540043339063,251,78125

%N a(n) = Sum_{p|n, p prime} p^nextprime(p), where nextprime(n) is the smallest prime > n.

%e a(6) = 251; a(6) = Sum_{p|6} p^nextprime(p) = 2^nextprime(2) + 3^nextprime(3) = 2^3 + 3^5 = 251.

%Y Cf. A151800 (nextprime v.2), A345280, A345281.

%K nonn

%O 1,2

%A _Wesley Ivan Hurt_, Feb 08 2022

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Last modified July 28 23:06 EDT 2024. Contains 374727 sequences. (Running on oeis4.)