1,1

See A094133 for links, references and more information.

Whereas a list of the possible x-values can be established by a brute-force search, this is not possible for the y-values. Some, however, may easily be excluded. For example, 4 cannot occur in this sequence, since for even y, x must be odd, and for x = 2k - 1, x^4 + 4^x = (x^2 + 2^k*x + 2^x)(x^2 - 2^k*x + 2^x).

A094133(n)=A162486(n)^A162487(n)+A162487(n)^A162486(n)

Sequence in context: A160419 A152659 A089452 this_sequence A115101 A023569 A051887

Adjacent sequences: A162484 A162485 A162486 this_sequence A162488 A162489 A162490

more,nonn

M. F. Hasler (MHasler(AT)univ-ag.fr), Jul 04 2009