Number of nX3 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.
A268793
Number of nX3 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.
Terms
- a(0) =12a(1) =78a(2) =248a(3) =950a(4) =3384a(5) =11948a(6) =41248a(7) =140698a(8) =474472a(9) =1586038a(10) =5262024a(11) =17348096a(12) =56884272a(13) =185647624a(14) =603388088a(15) =1953997896a(16) =6307338900a(17) =20300666174a(18) =65169102416a(19) =208712267048a(20) =666993883320
External references
- oeis: A268793