Permuations & Inverses Have Coprime Adjacent Pairs

[Giovanni Resta]

Max wrote:

> My calculations give
> 
> 1, 2, 2, 8, 4, 16, 24, 60, 140, 1328, 2144, 17536, 23296, 74216,
> 191544, 2119632, 4094976, 24223424, 45604056, 241559918

Max, I can confirm your values for both sequences.

Leroy, unfortunately this sequence above is already in the OEIS, see A103839.
The other one does not seem to be in the OEIS.

For what concernes the previous question (coprimes) the two
sequences, not in the OEIS, seem to starts with:

1, 2, 6, 9, 56, 23, 399, 442, 2220, 2386, 71577, 22001, 1179483, 1156519, 4975079
and
1, 2, 6, 8, 36, 16, 127, 320, 581, 1564, 13565, 13760, 149186, 773727, 540538

bye,
giovanni