A347307 Records in A347113.

1, 4, 10, 22, 46, 94, 118, 166, 334, 358, 718, 1438, 2878, 5758, 8158, 8254, 9838, 19678, 22558, 43198, 56638, 103198, 169438, 184798, 190558, 193918, 274558, 315358, 318238, 357598, 419038, 439678, 486238, 698398, 858238, 1716478, 1723198, 1965118, 2029438, 4058878

Offset

1,2

Links

Chai Wah Wu, Table of n, a(n) for n = 1..54

Prog

(Python)
from math import gcd
A347307_list, nset, m, c, j = [1], {1}, 2, 0, 2
for _ in range(10**4):
    k = m
    while k == j or gcd(k, j) == 1 or k in nset:
        k += 1
    if k > c:
        c = k
        A347307_list.append(k)
    j = k + 1
    nset.add(k)
    while m in nset:
        m += 1 # Chai Wah Wu, Sep 01 2021

Crossrefs

Cf. A347113, A347306, A347308.

Sequence in context: A038621 A078407 A347113 * A265054 A099018 A033484

Adjacent sequences: A347304 A347305 A347306 * A347308 A347309 A347310

Keyword

nonn

Author

N. J. A. Sloane, Sep 01 2021

Extensions

a(23)-a(40) from Alois P. Heinz, Sep 01 2021

Status

approved