a(n) is the number of negative Euler permutations of order 2*n. Bisection (even indices) of A347602.
A346720
a(n) is the number of negative Euler permutations of order 2*n. Bisection (even indices) of A347602.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =163a(4) =6724a(5) =692741a(6) =86756038a(7) =16135231015
External references
- oeis: A346720