Number of (n+2) X 4 0..2 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..2 introduced in row major order.
A204278
Number of (n+2) X 4 0..2 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..2 introduced in row major order.
Terms
- a(0) =274a(1) =622a(2) =865a(3) =193a(4) =539a(5) =735a(6) =1883a(7) =5187a(8) =12715a(9) =34507a(10) =94379a(11) =254955a(12) =696107a(13) =1902027a(14) =5190667a(15) =14180299a(16) =38741771a(17) =105832971a(18) =289139339a(19) =789944331a(20) =2158145035a(21) =5896158475a(22) =16108606475a(23) =44009485323a(24) =120236143115a(25) =328491255819
External references
- oeis: A204278