Number of nX7 0..1 arrays with every element unequal to 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A317901
Number of nX7 0..1 arrays with every element unequal to 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =22a(2) =6a(3) =116a(4) =315a(5) =502a(6) =3630a(7) =7770a(8) =34645a(9) =86317a(10) =320622a(11) =966922a(12) =3306875a(13) =10609266a(14) =34934092a(15) =114138685a(16) =374143779a(17) =1227335831a(18) =4020363887a(19) =13193058120a(20) =43248448731a(21) =141915161267a(22) =465495771858
External references
- oeis: A317901