0,1

If m=n then only one example m=n=1 exists.

Factorization :

2^12*5^2*7*13*31^2

2^13*5^2*7*13*8191*31^2

2^14*5*7^2*13*43*127*31^2

2^15*5^4*7*13*31*151*31^2

Cf. A144648.

Sequence in context: A017495 A017627 A154876 this_sequence A015398 A034614 A140501

Adjacent sequences: A144648 A144649 A144650 this_sequence A144652 A144653 A144654

nonn

Yasutoshi Kohmoto zbi74583.boat at orange.zero.jp, Jan 19 2009