[seqfan] Re: Polyominoes (A000105, A000988, A001168) - offset problem
Brendan.McKay at anu.edu.au
Thu Jun 25 11:15:55 CEST 2020
Anyone who sees an error on Wikipedia, and knows how to fix it but
responsible for the error.
But in this case there is no error. Wikipedia follows "reliable
sources" and in this case
the reliable source is Golumb's book "Polyominoes". From a brief look
it seems that
Golumb does not recognise a null polyomino (see Fig 1 and Tables 3 and
Wikipedia is *required* to either also disallow it or to change to a
Incidentally, the first comment on A0000105, which is
"A0000105(n) + A030228(n) = A000988(n)", is not correct for n=0 at the
On 25/6/20 5:27 pm, Neil Sloane wrote:
> Everything in the Wikipedia is inaccurate.
More information about the SeqFan