A343767 a(n) is the index of A023394(n) in flattened array A050922.

0, 1, 2, 3, 5, 4, 25, 7, 20, 21, 13, 6

Offset

1,3

Comments

a(14) = 26, a(15) = 16, a(16) = 27, a(20) = 17, a(22) = 28.

Permutation of the natural numbers.

Links

Table of n, a(n) for n=1..12.

Lorenzo Sauras-Altuzarra, Some properties of the factors of Fermat numbers, Art Discrete Appl. Math. (2022).

Index entries for sequences that are related to primes dividing Fermat numbers

Index entries for sequences that are permutations of the natural numbers

Formula

A023394(n) = A050922(a(n)).

Example

A023394(1) = 3 = A050922(0), so a(1) = 0.
A023394(2) = 5 = A050922(1), so a(2) = 1.

Crossrefs

Cf. A023394, A050922.

Sequence in context: A111631 A235610 A118141 * A175210 A264047 A264035

Adjacent sequences: A343764 A343765 A343766 * A343768 A343769 A343770

Keyword

nonn,more

Author

Lorenzo Sauras Altuzarra, Apr 28 2021

Status

approved