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A097232
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Starting primes for which there are no solutions in A097231.
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2
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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
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1,1
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LINKS
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FORMULA
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a(n) = the n-th starting prime for which there are no solutions in A097231.
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EXAMPLE
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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.
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CROSSREFS
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Cf. A097231 (number of distinct solutions for each starting prime), A097233 (starting primes with only one unique solution).
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KEYWORD
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nonn
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AUTHOR
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Chuck Seggelin (seqfan(AT)plastereddragon.com), Jul 31 2004
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STATUS
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approved
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