[seqfan] Re: A090566.

[David Wilson]

Another variant:

a(n) = smallest values such that the square number concat(a(n-1), a(n)) has not yet been seen.

> -----Original Message-----
> From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Neil
> Sloane
> Sent: Tuesday, November 24, 2015 12:24 AM
> To: Sequence Fanatics Discussion list
> Subject: [seqfan] Re: A090566.
> 
> David or Bob, What about this version of the sequence?
> a(1) = 1, a(n) = smallest number NOT YET IN THE SEQUENCE such that the
> concatenation of a(n-1) and a(n) is a square.
> 
> It starts rather like A082209, 1, 6, 4, 9, 61, 504, 100, ... but it isn't in the OEIS.
> Oh, maybe it dies - could you check?
> 
> Neil
> >