Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4.
A196142
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,4,1,2 for x=0,1,2,3,4.
Terms
- a(0) =5a(1) =17a(2) =26a(3) =83a(4) =168a(5) =346a(6) =865a(7) =2055a(8) =4745a(9) =10866a(10) =24967a(11) =57786a(12) =134514a(13) =312597a(14) =722915a(15) =1670991a(16) =3869674a(17) =8969607a(18) =20789120a(19) =48159310a(20) =111529135a(21) =258315343a(22) =598428365a(23) =1386426078a(24) =3211799633a(25) =7440009880a(26) =17234511484a(27) =39924363651a(28) =92487922123
External references
- oeis: A196142