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A140755
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Square array read by rows: T(n,k) = 41*n^2 + k^2 + n*k, with 20 columns.
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5
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43, 47, 53, 61, 71, 83, 97, 113, 131, 151, 173, 197, 223, 251, 281, 313, 347, 383, 421, 461, 167, 172, 179, 188, 199, 212, 227, 244, 263, 284, 307, 332, 359, 388, 419, 452, 487, 524, 563, 604, 373, 379, 387, 397, 409, 423, 439
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OFFSET
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1,1
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COMMENTS
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The original definition of this sequence was obscure: "A prime array is embedded in a binary quadratic equation that is a transform of x^2 - x + 41".
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LINKS
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MATHEMATICA
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With[{m=20}, Table[41*n^2 +k^2 +n*k, {n, m}, {k, m}]//Flatten (* G. C. Greubel, Oct 21 2023 *)
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PROG
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(Magma) m:=20; [41*n^2 +k^2 +n*k: k in [1..m], n in [1..m]]; // G. C. Greubel, Oct 21 2023
(SageMath) flatten([[41*n^2+k^2+n*k for k in range(1, 21)] for n in range(1, 21)]) # G. C. Greubel, Oct 21 2023
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CROSSREFS
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KEYWORD
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nonn,tabf,easy,less
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AUTHOR
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Aldrich Stevens (aldrichstevens(AT)msn.com), May 27 2008
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EXTENSIONS
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Partially edited with better definition by Omar E. Pol, Jan 11 2009
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STATUS
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approved
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