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A089621 n^4 + n-th prime. 1

%I

%S 3,19,86,263,636,1309,2418,4115,6584,10029,14672,20773,28602,38459,

%T 50672,65589,83580,105037,130388,160071,194554,234335,279924,331865,

%U 390722,457077,531544,614763,707390,810113,923648,1048707,1186058

%N n^4 + n-th prime.

%C Sum of reciprocals = 0.40492582319615..

%H Harvey P. Dale, <a href="/A089621/b089621.txt">Table of n, a(n) for n = 1..1000</a>

%t Table[n^4+Prime[n],{n,40}] (* _Harvey P. Dale_, Oct 03 2020 *)

%o (PARI) primeppwr(n) = { sr=0; for(x=1,n, y=x^4+prime(x); print1(y","); sr+=1./y; ); print(); print(sr) }

%K easy,nonn

%O 1,1

%A _Cino Hilliard_, Dec 31 2003

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Last modified January 23 11:16 EST 2022. Contains 350512 sequences. (Running on oeis4.)