OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..1660
Wikipedia, Permutation
Index entries for linear recurrences with constant coefficients, signature (8,-19,12).
FORMULA
G.f.: (17*x^4-27*x^3+17*x^2-1)/(12*x^3-19*x^2+8*x-1).
a(n) = A299789(2n+2,n).
EXAMPLE
a(1) = 8: 2143, 2341, 2413, 3142, 3421, 4123, 4312, 4321.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, Feb 22 2019
STATUS
approved