A166113 Center element of a 3 X 3 magic square composed of consecutive primes.

1480028171, 1850590099, 5196185989, 5601567229, 5757284539, 6048371071, 6151077311, 9517122301, 19052235889, 20477868361, 23813359697, 24026890201, 26748150313, 28519991429, 34821326161, 44420969951, 49285771751, 73827799051, 73974781931, 74220519391, 76483907879, 76560277051, 80143089671, 85892025269, 89132925809, 95515449079, 99977424731

Offset: 1

Author

Max Alekseyev, Oct 06 2009

Keywords

• nonn

Links

• Dmitry Petukhov, Table of n, a(n) for n = 1..759
• Index entries for sequences related to magic squares

Crossrefs

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

Formula

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.

a(n) = A270305(n)/3. - Arkadiusz Wesolowski, Mar 14 2016

Extensions

Extended by Max Alekseyev, Oct 13 2009

a(19)-a(27) added by Natalia Makarova, Oct 30 2015