Number of 3 X n 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
A269054
Number of 3 X n 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
Terms
- a(0) =27a(1) =174a(2) =594a(3) =3078a(4) =13140a(5) =58752a(6) =253416a(7) =1090344a(8) =4637904a(9) =19604352a(10) =82332384a(11) =343986912a(12) =1430547456a(13) =5925418752a(14) =24456120000a(15) =100618925568a(16) =412797979584
External references
- oeis: A269054