

A048541


a(n) is the smallest value of m such that A002378(m), the mth oblong number, contains exactly n 6's.


10



2, 60, 257, 816, 4082, 77887, 258237, 816512, 4546060, 25820081, 103276578, 815209584, 816472087, 2581876578, 24834787435, 258140787487, 1239623599592
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..17.
Eric Weisstein's World of Mathematics, Pronic Number


EXAMPLE

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).


CROSSREFS

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


KEYWORD

nonn,base,more


AUTHOR

Patrick De Geest, May 15 1999


EXTENSIONS

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


STATUS

approved



