[seqfan] Re: nice base-dependent sequence
zak seidov
zakseidov at yahoo.com
Fri May 28 20:15:38 CEST 2010
status report
I confirm all 37 entries by Martins
and keep running Mmca for further terms
Zak
--- On Fri, 5/28/10, N. J. A. Sloane <njas at research.att.com> wrote:
> From: N. J. A. Sloane <njas at research.att.com>
> Subject: [seqfan] nice base-dependent sequence
> To: seqfan at seqfan.eu
> Cc: njas at research.att.com
> Date: Friday, May 28, 2010, 12:10 PM
> Dear Seq Fans, This just caught
> my eye. Anyone care to
> produce a b-file?
>
> %I A177834
> %S A177834
> 1,2,6,12,45,54,56,56,245,504,1440,1440,5044,5044,10456,10569,11704,
> %T A177834
> 11704,11704,13608,13608,13608,26460,26460,198007,258064,264600,264600,
> %U A177834
> 475440,475440,1754608,1754608,2258064,2258064,2646004,2646004,2992520
> %N A177834 Smallest integer k such that k or one of its
> substrings (regarded as an integer) is divisible by every
> integer from {1,2,...,n}
> %e A177834 a(8)=56 because 56 is divisible by 1,2,4,7,8; 5
> is divisible by 5; 6 is divisible by 3 and 6. Therefore the
> set {1,2,3,4,5,6,7,8} is covered by the divisors. 56 is the
> smallest number with this property.
> %K A177834 nonn,base,nice,new
> %O A177834 1,2
> %A A177834 Martins Opmanis (askola(AT)latnet.lv), May 14
> 2010
> %E A177834 Edited by N. J. A. Sloane, May 28 2010.
>
> Neil
>
>
>
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