Number of (n+1)X(3+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.
A232584
Number of (n+1)X(3+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.
Terms
- a(0) =2a(1) =12a(2) =42a(3) =122a(4) =332a(5) =882a(6) =2322a(7) =6092a(8) =15962a(9) =41802a(10) =109452a(11) =286562a(12) =750242a(13) =1964172a(14) =5142282a(15) =13462682a(16) =35245772a(17) =92274642a(18) =241578162a(19) =632459852a(20) =1655801402a(21) =4334944362a(22) =11349031692a(23) =29712150722a(24) =77787420482a(25) =203650110732
External references
- oeis: A232584