Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,3,4 for x=0,1,2,3,4.
A195972
Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,3,4 for x=0,1,2,3,4.
Terms
- a(0) =3a(1) =9a(2) =14a(3) =23a(4) =43a(5) =78a(6) =139a(7) =249a(8) =450a(9) =815a(10) =1475a(11) =2674a(12) =4859a(13) =8841a(14) =16102a(15) =29359a(16) =53587a(17) =97894a(18) =178971a(19) =327425a(20) =599394a(21) =1097871a(22) =2011875a(23) =3688402a(24) =6764595a(25) =12410585a(26) =22775742a(27) =41808791a(28) =76765147a(29) =140977582
External references
- oeis: A195972