Number of nX1 0..3 arrays with no more than floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.
A222372
Number of nX1 0..3 arrays with no more than floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =5a(5) =14a(6) =17a(7) =75a(8) =95a(9) =411a(10) =519a(11) =2522a(12) =3211a(13) =15919a(14) =20299a(15) =103627a(16) =132515a(17) =683480a(18) =875491a(19) =4554799a(20) =5844093a(21) =30542304a(22) =39239961a(23) =205785953a(24) =264702489a(25) =1391485044a(26) =1791699029a(27) =9436529666a(28) =12161620195a(29) =64150640719
External references
- oeis: A222372