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A260850
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Lexicographically earliest sequence such that for any n>1, n=u*v, where u/v = a(n)/a(n-1) in reduced form.
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1
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1, 2, 6, 24, 120, 20, 140, 1120, 10080, 1008, 11088, 924, 12012, 858, 1430, 22880, 388960, 1750320, 33256080, 1662804, 3879876, 176358, 4056234, 10816624, 270415600, 10400600, 280816200, 10029150, 290845350, 9694845, 300540195, 9617286240, 35263382880
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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a(p) = p*a(p-1) for any prime p.
a(n) = A008336(n+1) for n = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 21, 22, 23; are there other indexes with this property?
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LINKS
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Paul Tek, Table of n, a(n) for n = 1..3365
Paul Tek, PARI program for this sequence
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PROG
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(PARI) See Links section.
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CROSSREFS
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Cf. A008336.
Sequence in context: A110808 A284567 A065422 * A008336 A033643 A050211
Adjacent sequences: A260847 A260848 A260849 * A260851 A260852 A260853
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KEYWORD
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nonn
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AUTHOR
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Paul Tek, Aug 01 2015
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STATUS
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approved
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