A283245 Square root of the smallest square referenced in A280296 (Squarefree numbers n such that 2^n - 1 is divisible by a square > 1).

3, 7, 3, 3, 3, 3, 3, 7, 11, 3, 3, 31, 3, 3, 3, 3, 7, 3, 23, 3, 7, 3, 31, 3, 3, 3, 7, 3, 3, 7, 3, 3, 3, 3, 31, 3, 7, 23, 3, 3, 3, 3, 3, 43, 3, 7, 3, 3, 7, 3, 3, 3, 3, 23, 3, 11, 7, 3, 3, 3

Offset

1,1

Links

Table of n, a(n) for n=1..60.

Example

A280296(1)=6, 2^6-1 = 63 = 3*3*7, so 63 is not squarefree the square being 3*3=9 and the root is 3.

Crossrefs

Cf. A280296, A283092.

Sequence in context: A135613 A019973 A010623 * A066065 A145511 A242461

Adjacent sequences: A283242 A283243 A283244 * A283246 A283247 A283248

Keyword

nonn

Author

Robert Price, Mar 06 2017

Status

approved