OFFSET
0,3
FORMULA
a(n) = A287213(2n,n).
EXAMPLE
a(2) = 5: 124|3, 134|2, 13|24, 13|2|4, 1|24|3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Oct 21 2017
STATUS
approved