OFFSET

1,1

COMMENTS

Conjecture: Each integer n > 8 can be written as a sum of finitely many numbers of the form 3^a + 4^b (a,b >= 0) with no one dividing another. This has been verified for all n <= 1500. - Zhi-Wei Sun, Apr 18 2023

LINKS

T. D. Noe, Table of n, a(n) for n = 1..10000

MATHEMATICA

a = 3; b = 4; mx = 5000; Union[Flatten[Table[a^n + b^m, {m, 0, Log[b, mx]}, {n, 0, Log[a, mx - b^m]}]]]

CROSSREFS

KEYWORD

nonn

AUTHOR

T. D. Noe, Jun 19 2013

STATUS

approved