cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A272387 Smallest primes of 6 X 6 magic squares formed from consecutive primes.

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%I A272387 #13 Feb 16 2025 08:33:34
%S A272387 7,41,47,59,67,137,149,151,173,181,191,199,229,241,257,277,283,313,
%T A272387 409,421,499,503,509,631,701,709,829,887,907,971,977,983,1013,1019,
%U A272387 1033,1049,1051,1061,1201,1223,1229,1321,1439,1451,1459,1489,1493,1523,1531,1549
%N A272387 Smallest primes of 6 X 6 magic squares formed from consecutive primes.
%H A272387 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PrimeMagicSquare.html">Prime Magic Square</a>
%H A272387 <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a>
%o A272387 (PARI) A272387(n)=MagicPrimes(A177434(n),6)[1] \\ See A073519 for MagicPrimes(). - _M. F. Hasler_, Oct 28 2018
%o A272387 (PARI) is_candidate(p,N=6)={denominator(p=A177434(,p,N))==1 && !bittest(p-N,0)} \\ This necessary condition is also sufficient for all primes up to and beyond the limit of the terms displayed in DATA. - _M. F. Hasler_, Oct 30 2018
%Y A272387 Cf. A256891 (analog for 3 X 3), A260673 (4 X 4), A272386 (5 X 5).
%Y A272387 Cf. A177434 (magic sums, 6 X 6 consecutive primes).
%K A272387 nonn
%O A272387 1,1
%A A272387 _Arkadiusz Wesolowski_, Apr 28 2016