A075788 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 r.

3, 3, 2, 2, 3, 0, 4, 4, 5, 13, 3, 4, 7, 0, 8, 5, 5, 3, 3, 6, 5, 7, 3, 2, 5, 35, 6, 2, 15, 83, 16, 6, 7, 0, 18, 10, 8, 37, 8, 7, 7, 0, 22, 5, 7, 17, 2, 8, 9, 0, 10, 14, 27, 9, 8, 8, 11, 0, 30, 8, 5, 0, 12, 10, 9, 0, 34, 10, 13, 0, 14, 9, 9, 3, 10, 5, 9, 0, 2, 12, 15, 0, 42, 10, 11, 0, 16, 13, 11, 0, 10

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..91.

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: A139092 A366424 A021305 * A362503 A324080 A303934

Adjacent sequences: A075785 A075786 A075787 * A075789 A075790 A075791

Keyword

nonn

Author

Zak Seidov, Oct 13 2002

Extensions

More terms from David Wasserman, Jan 23 2005

Status

approved