Number of length n+2 0..4 arrays with no three unequal elements in a row and new values 0..4 introduced in 0..4 order.
A243635
Number of length n+2 0..4 arrays with no three unequal elements in a row and new values 0..4 introduced in 0..4 order.
Terms
- a(0) =4a(1) =9a(2) =21a(3) =51a(4) =127a(5) =324a(6) =844a(7) =2242a(8) =6062a(9) =16655a(10) =46411a(11) =130937a(12) =373349a(13) =1074194a(14) =3114146a(15) =9085176a(16) =26643492a(17) =78470989a(18) =231925649a(19) =687430207a(20) =2042284587a(21) =6078844480a(22) =18121207896a(23) =54086361422a(24) =161592030394a(25) =483170313579
External references
- oeis: A243635