Number of n X 2 0..2 arrays with row sums unimodal and column sums inverted unimodal.
A223882
Number of n X 2 0..2 arrays with row sums unimodal and column sums inverted unimodal.
Terms
- a(0) =9a(1) =81a(2) =564a(3) =3298a(4) =17048a(5) =80412a(6) =353485a(7) =1469903a(8) =5845411a(9) =22414731a(10) =83409546a(11) =302722400a(12) =1075880306a(13) =3756503134a(14) =12919764299a(15) =43865509013a(16) =147290172421a(17) =489846413077
External references
- oeis: A223882