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A048541 a(n) is the smallest value of m such that A002378(m), the m-th 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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified March 2 19:18 EST 2021. Contains 341756 sequences. (Running on oeis4.)