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A111198 Numbers n such that sequence A_n does not contain a perfect square. 1
37, 40, 43, 57, 58, 101 (list; graph; refs; listen; history; text; internal format)
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 A000001-A000036 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

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Last modified March 30 12:10 EDT 2020. Contains 333125 sequences. (Running on oeis4.)