A048548 Smallest oblong (promic) number containing exactly n 9's.

90, 992, 792990, 4992990, 199699292, 919999892, 29939899992, 939969999920, 99179499990990, 999690999669990, 129990929999959950, 299899968999993990, 10999489909979999990, 299929969229995999992, 12999999959999499709890, 126994909999399899999990, 9399899999156999909995992

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Eric Weisstein's World of Mathematics, Pronic Number

Crossrefs

Cf. A048547, A002378.

Cf. A048530, A048532, A048534, A048536, A048538, A048540, A048542, A048544, A048546.

Sequence in context: A202960 A124167 A223364 * A013427 A013425 A013428

Adjacent sequences: A048545 A048546 A048547 * A048549 A048550 A048551

Keyword

nonn,base

Author

Patrick De Geest, May 15 1999

Extensions

a(13)-a(17) from Giovanni Resta, Oct 09 2019

Status

approved