Number of nX3 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A301356
Number of nX3 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =6a(2) =13a(3) =34a(4) =92a(5) =256a(6) =721a(7) =2036a(8) =5701a(9) =15848a(10) =43916a(11) =121825a(12) =338722a(13) =943311a(14) =2628900a(15) =7326706a(16) =20413096a(17) =56853677a(18) =158313447a(19) =440815860a(20) =1227496584a(21) =3418358547a(22) =9520049340a(23) =26513664655a(24) =73841105634a(25) =205645969535a(26) =572712412815
External references
- oeis: A301356