Number of zig-zag paths from top to bottom of a rectangle of width 11 with 2n-1 rows whose color is that of the top right corner.
A153372
Number of zig-zag paths from top to bottom of a rectangle of width 11 with 2n-1 rows whose color is that of the top right corner.
Terms
- a(0) =6a(1) =20a(2) =72a(3) =264a(4) =976a(5) =3624a(6) =13488a(7) =50264a(8) =187440a(9) =699240a(10) =2609008a(11) =9735768a(12) =36332016a(13) =135588200a(14) =506012592a(15) =1888445784a(16) =7047737776a(17) =26302439784a(18) =98161890288a(19) =366344859224
External references
- oeis: A153372