Number of nX1 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal.
A206727
Number of nX1 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal.
Terms
- a(0) =3a(1) =9a(2) =25a(3) =69a(4) =190a(5) =523a(6) =1440a(7) =3965a(8) =10918a(9) =30064a(10) =82785a(11) =227959a(12) =627714a(13) =1728490a(14) =4759616a(15) =13106205a(16) =36089594a(17) =99377264a(18) =273647872a(19) =753524044a(20) =2074923809a(21) =5713565277a(22) =15733025007a(23) =43322875275a(24) =119295019315a(25) =328493931740
External references
- oeis: A206727