[seqfan] Re: a(n) and n have the same digitsum but no digit in common

Eric Angelini Eric.Angelini at kntv.be
Thu Jan 6 19:36:19 CET 2011

>David Wilson

>Assuming digitsum actually means digital root,
>the least n >= 1 for which
>a(n) is undefined is n = 1124578.

>I figured this out in my head.

... this is wild! 2011 starts well!
(empty head)

More information about the SeqFan mailing list