A347308 Indices of records in A347113.

1, 2, 3, 4, 5, 6, 36, 41, 42, 90, 91, 92, 93, 94, 519, 1044, 1251, 1252, 1422, 2748, 3591, 6528, 10685, 11661, 12028, 12236, 17326, 19899, 20074, 22571, 26429, 27702, 30538, 43975, 54016, 54017, 54229, 61703, 63862, 63863, 127935, 127936, 269513, 297679, 342675

Offset: 1

Author

N. J. A. Sloane, Sep 01 2021

Keywords

• nonn

Links

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

Crossrefs

Cf. A347113, A347306, A347307.

Programs

Python

from math import gcd
A347308_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 k > c:
        c = k
        A347308_list.append(i)
    j = k + 1
    nset.add(k)
    while m in nset:
        m += 1 # Chai Wah Wu, Sep 01 2021

Extensions

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

a(41)-a(42) from Chai Wah Wu, Sep 01 2021

a(43)-a(45) from Chai Wah Wu, Sep 02 2021