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A048541
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a(n) is the smallest value of m such that A002378(m), the m-th oblong number, contains exactly n 6's.
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10
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2, 60, 257, 816, 4082, 77887, 258237, 816512, 4546060, 25820081, 103276578, 815209584, 816472087, 2581876578, 24834787435, 258140787487, 1239623599592
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..17.
Eric Weisstein's World of Mathematics, Pronic Number
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EXAMPLE
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From Jesse Sealand, Oct 07 2019: (Start)
a(1) = 2 since A002378(2) = 6;
a(2) = 60 since A002378(60) = 3660;
a(3) = 257 since A002378(257) = 66306;
a(4) = 816 since A002378(816) = 666672, etc.
(End).
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CROSSREFS
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Cf. A048542, A002378.
Cf. A048529, A048531, A048533, A048535, A048537, A048539, A048543, A048545, A048547.
Sequence in context: A328859 A141055 A275819 * A067739 A187626 A059934
Adjacent sequences: A048538 A048539 A048540 * A048542 A048543 A048544
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KEYWORD
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nonn,base,more
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AUTHOR
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Patrick De Geest, May 15 1999
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EXTENSIONS
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a(14)-a(16) from Lars Blomberg, Jun 10 2011
Name edited by Jesse Sealand, Oct 07 2019
a(17) from Giovanni Resta, Oct 09 2019
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STATUS
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approved
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