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Search: id:A115050
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| A115050 |
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Numbers n such that in the 3 X 3 square arrangement of the 9 primes p(n),..,p(n+8), totals of 3 rows and 3 columns, are all prime. |
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1
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OFFSET
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1,1
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EXAMPLE
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a(1) = 417979 because p(417979) = 6080051 and we have 3 x 3 square with desired property:
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..7..11..13=>31.
.17..19..23=>59.
.29..31..37=>97.
..v..v...v.
.53..61..73.
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CROSSREFS
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Cf. A116936.
Sequence in context: A058464 A053951 A058460 this_sequence A072724 A116271 A058417
Adjacent sequences: A115047 A115048 A115049 this_sequence A115051 A115052 A115053
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Feb 28 2006
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