Number of tilings using squares, dominos, and flexible trominos of a strip of length n-1 and with an n-th cell placed on top of the middle of the strip.
A374729
Number of tilings using squares, dominos, and flexible trominos of a strip of length n-1 and with an n-th cell placed on top of the middle of the strip.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =4a(4) =7a(5) =12a(6) =21a(7) =40a(8) =76a(9) =139a(10) =254a(11) =466a(12) =855a(13) =1576a(14) =2905a(15) =5340a(16) =9816a(17) =18053a(18) =33202a(19) =61076a(20) =112351a(21) =206636a(22) =380045a(23) =699012a(24) =1285684a(25) =2364759a(26) =4349502a(27) =7999954a(28) =14714159a(29) =27063568
External references
- oeis: A374729