

A111198


Numbers n such that sequence A_n does not contain a perfect square.


1




OFFSET

1,1


COMMENTS

That is, the complete sequence A_n, not just the terms that are shown in the entry, does not contain a perfect square or the negative of a perfect square. (In particular, sequences containing 0 or 1 are excluded.)
No more terms up through 130. Does A000131 contain a perfect square?
I've checked A000131 up to a(25000) and can report that I found no perfect square.  Robert G. Wilson v, Jun 23 2014


LINKS

Table of n, a(n) for n=1..6.


EXAMPLE

The first term, 37, refers to the sequence A000037, the nonsquares. All of A000001A000036 contain obvious square terms.
The second term, 40, refers to A000040, the primes. Obviously any sequence which is a subset of the primes (e.g. A000043) also gives a term.


CROSSREFS

Sequence in context: A064172 A242989 A295801 * A081645 A069963 A071855
Adjacent sequences: A111195 A111196 A111197 * A111199 A111200 A111201


KEYWORD

nonn,dumb,less


AUTHOR

Zak Seidov, Oct 24 2005


EXTENSIONS

Let's have no more sequences of this type!  N. J. A. Sloane, Oct 23 2005


STATUS

approved



