20/09/07 01:05:37 unwjSiJ3.net
>>507
数表としてはこれで十分だな
これの元ページのCOMMENTSに色々書いてあるけど、証明はどこにあるのかね？
URLﾘﾝｸ(oeis.org)
> COMMENTS
>a(n) mod 20 = 10 for n >= 3. - G. C. Greubel, Nov 05 2018
>
>This sequence is infinite, because for n > 1, 3^a(n) + 1 is in this sequence. - Jinyuan Wang, Nov 06 2018
>
>For the provided data, if k is a term then p*k is a term where p is an odd divisor of k. - David A. Corneth, Nov 06 2018