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A075791 If n can be written in the form r^i-s^j (see A074981), where r,s,i,j are integers with r>0, s>0, i>1, j>1 choose the representation with smallest r^i (in case of ties, minimize i and j); or if n is not of this form set r=s=i=j=0; sequence gives values of j. 2
3, 2, 2, 2, 2, 0, 2, 2, 2, 7, 2, 2, 2, 0, 2, 2, 3, 2, 3, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 0, 2, 2, 3, 3, 2, 2, 3, 0, 2, 2, 2, 5, 2, 2, 5, 0, 2, 2, 2, 3, 2, 3, 2, 0, 2, 2, 2, 0, 2, 2, 2, 0, 2, 5, 2, 0, 3, 2, 3, 2, 2, 2, 2, 0, 2, 2, 2, 0, 2, 2, 2, 0, 2, 2, 5, 0, 2, 3, 5, 3, 2, 2, 7, 3, 2, 2, 3, 0, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The zeros are only conjectures (cf. A074981).

Use 4^2 rather than 2^4, etc.

LINKS

Table of n, a(n) for n=1..105.

EXAMPLE

1 = 3^2 - 2^3, 2 = 3^3 - 5^2, 3 = 2^2 - 1^2, 4 = 2^3 - 2^2, etc.

CROSSREFS

Sequence in context: A116943 A144476 A155677 * A262626 A104435 A178815

Adjacent sequences:  A075788 A075789 A075790 * A075792 A075793 A075794

KEYWORD

nonn

AUTHOR

Zak Seidov, Oct 13 2002

EXTENSIONS

More terms from David Wasserman, Jan 23 2005

STATUS

approved

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Last modified February 20 14:59 EST 2019. Contains 320327 sequences. (Running on oeis4.)