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A250215
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Least k such that the n-th weak irregular prime (A250216(n)) divides A241601(k).
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0
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11, 23, 32, 13, 15, 44, 7, 27, 29, 19, 63, 24, 22, 43, 129, 130, 62, 75, 133, 84, 211, 127, 164, 100, 84, 9, 20, 156, 88, 87, 280, 19, 71, 125, 163, 100, 200, 382, 126, 159, 240, 215, 196, 130, 94, 292, 141, 400, 86, 270, 222, 175, 389, 52, 45, 22, 592, 522, 20
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OFFSET
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1,1
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COMMENTS
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A prime p can divide A241601(k) for more than one k; the first few examples are as follows:
p k
67 27, 58
101 63, 68
149 130, 147
157 62, 110
241 211, 239
263 100, 213
307 88, 91, 137
311 87, 193, 292
349 19, 257
353 71, 186, 300
etc.
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LINKS
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EXAMPLE
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19 is the first weak irregular prime and divides A241601(11) = 50521, so a(1) = 11.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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