A192111 Monotonic ordering of nonnegative differences 3^i-2^j, for i>=0, j>=0.

0, 1, 2, 5, 7, 8, 11, 17, 19, 23, 25, 26, 49, 65, 73, 77, 79, 80

Offset

1,3

Comments

Complement of A173671 in the nonnegative integers.

Links

Table of n, a(n) for n=1..18.

H. Gauchman and I. Rosenholtz (Proposers), R. Martin (Solver), Difference of prime powers, Problem 1404, Math. Mag., 65 (No. 4, 1992), 265; Solution, Math. Mag., 66 (No. 4, 1993), 269.

Math Overflow, 3^n - 2^m = +-41 is not possible. How to prove it?, Several contributors, Jun 29 2010.

Crossrefs

Cf. A173671 (complement), A192110, A227048 (partial unions of rows).

Sequence in context: A216565 A285938 A325441 * A294635 A362591 A032402

Adjacent sequences: A192108 A192109 A192110 * A192112 A192113 A192114

Keyword

nonn

Author

Clark Kimberling, Jun 23 2011

Extensions

Deleted unwarranted programs and b-file. Only the terms in A173671 (that is, up to 100) have been proved to be correct. - N. J. A. Sloane, Oct 21 2019

Status

approved