Column 2 of triangle A098542, which shifts left and up under the matrix square.
A098543
Column 2 of triangle A098542, which shifts left and up under the matrix square.
Terms
- a(0) =1a(1) =4a(2) =12a(3) =44a(4) =236a(5) =2028a(6) =29164a(7) =719340a(8) =30943724a(9) =2350770668a(10) =318680099308
External references
- oeis: A098543