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

Author

Patrick De Geest, May 15 1999

Keywords

• nonn
• base

Links

• Eric Weisstein's World of Mathematics, Pronic Number

Crossrefs

Cf. A048547, A002378.

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

Extensions

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