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Search: id:A123571
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| A123571 |
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Smallest prime p such that p divides m^(m+1)+1, where m = (p-2n-1)/(2n). |
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1
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| 13, 29, 79, 41, 41, 313, 421, 257, 541, 461, 1013, 673, 2341, 197, 661, 2113, 1361, 1009, 4447, 15161, 2857, 7789, 7499, 2113, 5101, 8269, 811, 9689, 1567, 1381, 2543, 31489, 3631, 23189, 9941, 10513, 16651, 21661, 84163, 5281, 13613, 1933, 22447
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OFFSET
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1,1
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COMMENT
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Corresponding m = {5,6,12,4,3,25,29,15,29,22,45,27,89,6,21,...}.
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EXAMPLE
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a(1) = 13 because for m = (13-3)/2 = 5 prime 13 divides m^(m+1)+1 = 5^6+1 = 15626, but m^(m+1)+1 is not divisible by any prime p of the form p=2m+3 for m<5.
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CROSSREFS
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Sequence in context: A075636 A139838 A141196 this_sequence A120273 A104817 A048450
Adjacent sequences: A123568 A123569 A123570 this_sequence A123572 A123573 A123574
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KEYWORD
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nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Nov 12 2006
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 17 2008
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