

A250215


Least k such that the nth weak irregular prime (A250216(n)) divides A241601(k).


0



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
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OFFSET

1,1


COMMENTS

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.


LINKS

Table of n, a(n) for n=1..34.
Eric Weisstein's World of Mathematics, Irregular Pair


EXAMPLE

19 is the first weak irregular prime and divides A241601(11) = 50521, so a(1) = 11.


CROSSREFS

Cf. A035112, A250216, A000928, A120337, A128197.
Sequence in context: A090920 A126330 A090506 * A208326 A097657 A041234
Adjacent sequences: A250212 A250213 A250214 * A250216 A250217 A250218


KEYWORD

nonn,more


AUTHOR

Eric Chen, Dec 26 2014


STATUS

approved



