Number of nX6 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.
A224156
Number of nX6 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.
Terms
- a(0) =22a(1) =169a(2) =702a(3) =2271a(4) =6786a(5) =20065a(6) =60214a(7) =184233a(8) =575410a(9) =1833641a(10) =5947567a(11) =19579806a(12) =65205152a(13) =219009930a(14) =740080588a(15) =2511332286a(16) =8545644419a(17) =29133026750a(18) =99436525669a(19) =339656225391
External references
- oeis: A224156