1,2

Each term of the Q-sequence is the sum of two previous terms. This sequence gives the Q-sequence terms which appear never to be used as one of those two. In other words, a(n) != x - A005185(x-1), and a(n) != x - A005185(x-2).

Benjamin Chaffin, Table of n, a(n) for n = 1..10000

Cf. A005185, A076701.

Sequence in context: A278976 A179419 A224549 * A043371 A304369 A074266

Adjacent sequences: A327281 A327282 A327283 * A327285 A327286 A327287

nonn

Benjamin Chaffin, Sep 15 2019

approved