A353710 Smallest missing number when A353709(n) is being calculated.

0, 1, 2, 3, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 11, 11, 11, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 27, 27, 27, 27, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29

Offset: 0

Author

N. J. A. Sloane, May 06 2022

Keywords

• nonn
• base

Links

• Rémy Sigrist, Table of n, a(n) for n = 0..16384
• Rémy Sigrist, PARI program

Crossrefs

Cf. A084937, A353709.

Programs

PARI

See Links section.

Python

from itertools import count, islice
def A353710_gen(): # generator of terms
    s, a, b, c, ab = {0,1}, 0, 1, 2, 1
    yield from (0,1)
    while True:
        for n in count(c):
            if not (n & ab or n in s):
                yield c
                a, b = b, n
                ab = a|b
                s.add(n)
                while c in s:
                    c += 1
                break
A353710_list = list(islice(A353710_gen(),20)) # Chai Wah Wu, May 10 2022