

A097232


Starting primes for which there are no solutions in A097231.


2



2, 23, 83, 157, 181, 211, 223, 227, 229, 233, 239, 251, 283, 311, 331, 347, 353, 359, 367, 421, 431, 433, 439, 443, 461, 463, 467, 503, 521, 541, 547, 557, 577, 587, 593, 599, 601, 619, 631, 641, 647, 677, 683, 691, 701, 709, 719, 727, 733, 797, 809, 811
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..52.


FORMULA

a(n) = the nth starting prime for which there are no solutions in A097231.


EXAMPLE

a(1) = 2 because there is no 3 X 3 square arrangement of the primes 2, 3, 5, 7, 11, 13, 17, 19 and 23 such that all row, column and diagonal totals are primes. a(2) = 23 because there is no 3 X 3 square arrangement of the primes 23, 29, 31, 37, 41, 43, 47, 53 and 59 such that all row, column and diagonal totals are primes.


CROSSREFS

Cf. A097231 (number of distinct solutions for each starting prime), A097233 (starting primes with only one unique solution).
Sequence in context: A217113 A042679 A209194 * A222564 A099134 A069152
Adjacent sequences: A097229 A097230 A097231 * A097233 A097234 A097235


KEYWORD

nonn


AUTHOR

Chuck Seggelin (seqfan(AT)plastereddragon.com), Jul 31 2004


STATUS

approved



