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A107973
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Numbers of the form a^2 + b for a= 21 to 40 and b= 20 to 1 step -1.
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0
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461, 503, 547, 593, 641, 691, 743, 797, 853, 911, 971, 1033, 1097, 1163, 1231, 1301, 1373, 1447, 1523, 1601
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Complete list of 20 prime numbers also of the form n^2+n+41 for n=20 to 39
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LINKS
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EXAMPLE
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21*21+20=461
22*22+19=503
23*23+18=547
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MATHEMATICA
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#[[1]]^2+#[[2]]&/@Thread[{Range[21, 40], Range[20, 1, -1]}] (* Harvey P. Dale, Jan 01 2018 *)
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CROSSREFS
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KEYWORD
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fini,full,nonn
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AUTHOR
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STATUS
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approved
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