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A357064
a(n) = k such that A091411(k) = A091409(n).
0
1, 2, 3, 7, 418090195952691922788354
OFFSET
1,2
COMMENTS
The existence of a(n) is proven in Lemma 1.2(a) of the article "The first occurrence of a number in Gijswijt's sequence". There, it is called t^{(1)}(n). In this article, a formula for the numbers t^{(m)}(n) is given. It looks like a tower of exponents and can be found in Theorem 6.20. This formula is then used to find a formula for the first occurrence of an integer n in Gijswijt's sequence, which is A091409(n).
The value of a(5) is calculated in Subsection 8.2 of the same article.
The value of a(6) is larger than 10^(10^100), so it would be impossible to include here.
LINKS
EXAMPLE
For n=4 we have A091411(7)=A091409(4). Therefore, a(4)=7.
CROSSREFS
Sequence in context: A048979 A201363 A088332 * A131959 A202688 A021046
KEYWORD
nonn
AUTHOR
Levi van de Pol, Sep 10 2022
STATUS
approved