[seqfan] Re: Nonattacking queens on a quarter-boar

[Bob Selcoe]

Rob, 

A hunch -  do a(65..67) = 31 and a(88..90) = 42, while all other terms a(51..87) appear in pairs, increasing by 1?

Cheers, 
Bob Selcoe

Sent from my iPhone

> On Jun 4, 2017, at 10:15 AM, Rob Pratt <Rob.Pratt at sas.com> wrote:
> 
> The first 50 terms are:
> 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 23, 23
> 
> The sequence for odd boards is already here: http://oeis.org/A274933
> 
> -----Original Message-----
> From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Neil Sloane
> Sent: Sunday, June 04, 2017 10:55 AM
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Subject: [seqfan] Nonattacking queens on a quarter-boar
> 
> EXTERNAL
> 
> For an application I needed this new sequence, A287864, which I did by hand
> - needs more terms
> 
> --
> Seqfan Mailing list - http://list.seqfan.eu/
> 
> --
> Seqfan Mailing list - http://list.seqfan.eu/