Number of idempotents in the twisted planar partition monoid PP_n^tau.
A286867
Number of idempotents in the twisted planar partition monoid PP_n^tau.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =44a(4) =362a(5) =3226a(6) =30488a(7) =301460a(8) =3090020a(9) =32618046a(10) =345515557
External references
- oeis: A286867