A347314 Fixed points of A347113.

1, 24, 66, 70, 88, 156, 180, 476, 480, 484, 1292, 3182, 3440, 3444, 3604, 5724, 6486, 7470, 8466, 12426

Offset: 1

Author

N. J. A. Sloane, Sep 07 2021

Keywords

• nonn
• more

Comments

If it exists, a(21) > 400000. - Hugo Pfoertner, Sep 07 2021

a(21) > 3*10^6 if it exists. - Chai Wah Wu, Nov 24 2021

Crossrefs

Cf. A347113.

Programs

Python

from math import gcd
A347314_list, nset, m, c, j, i = [1], {1}, 2, 0, 2, 1
for _ in range(10**4):
    i += 1
    k = m
    while k == j or gcd(k,j) == 1 or k in nset:
        k += 1
    if i == k:
        A347314_list.append(i)
    j = k + 1
    nset.add(k)
    while m in nset:
        m += 1 # Chai Wah Wu, Sep 07 2021

Extensions

a(20) from Hugo Pfoertner, Sep 07 2021