Number of zig-zag paths from top to bottom of a 2n by 2n square whose color is that of the top right corner.
A153336
Number of zig-zag paths from top to bottom of a 2n by 2n square whose color is that of the top right corner.
Terms
- a(0) =1a(1) =8a(2) =52a(3) =296a(4) =1556a(5) =7768a(6) =37416a(7) =175568a(8) =807604a(9) =3657464a(10) =16357496a(11) =72407728a(12) =317777032a(13) =1384524656a(14) =5994736336a(15) =25816193952a(16) =110652549620a(17) =472302724408
External references
- oeis: A153336