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A075790 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 s. 1
2, 5, 1, 2, 2, 0, 1, 1, 4, 3, 4, 2, 6, 0, 1, 3, 2, 3, 2, 4, 2, 3, 2, 1, 10, 1, 3, 2, 14, 19, 1, 2, 4, 0, 1, 8, 3, 11, 5, 3, 2, 0, 21, 9, 2, 3, 9, 1, 2, 0, 7, 12, 26, 3, 3, 2, 8, 0, 29, 2, 8, 0, 1, 6, 4, 0, 33, 2, 10, 0, 5, 3, 2, 13, 5, 7, 2, 0, 7, 1, 12, 0, 41, 4, 6, 0, 13, 9, 2, 0, 3, 2, 2, 3, 7, 2, 2, 3 (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..98.

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: A197814 A091772 A275479 * A240543 A004575 A021402

Adjacent sequences:  A075787 A075788 A075789 * A075791 A075792 A075793

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 June 23 21:09 EDT 2018. Contains 311812 sequences. (Running on oeis4.)