A166113 - OEIS

%I #29 Apr 10 2017 10:44:23

%S 1480028171,1850590099,5196185989,5601567229,5757284539,6048371071,

%T 6151077311,9517122301,19052235889,20477868361,23813359697,

%U 24026890201,26748150313,28519991429,34821326161,44420969951,49285771751,73827799051,73974781931,74220519391,76483907879,76560277051,80143089671,85892025269,89132925809,95515449079,99977424731

%N Center element of a 3 X 3 magic square composed of consecutive primes.

%H Dmitry Petukhov, <a href="/A166113/b166113.txt">Table of n, a(n) for n = 1..759</a>

%H <a href="/index/Mag#magic">Index entries for sequences related to magic squares</a>

%F An element p of A096710 belongs to this sequence iff q+r=s+p and (q+s=p+t or r+s=p+t), where p,q,r,s,t are consecutive primes.

%F a(n) = A270305(n)/3. - _Arkadiusz Wesolowski_, Mar 14 2016

%Y Cf. A073519, A256891, A270305. Subsequence of A096710.

%K nonn

%O 1,1

%A _Max Alekseyev_, Oct 06 2009

%E Extended by _Max Alekseyev_, Oct 13 2009

%E a(19)-a(27) added by _Natalia Makarova_, Oct 30 2015