Number of zig-zag paths from top to bottom of a rectangle of width 11 with 2n-1 rows whose color is not that of the top right corner.

A153373

Number of zig-zag paths from top to bottom of a rectangle of width 11 with 2n-1 rows whose color is not that of the top right corner.

Terms

    a(0) =5a(1) =18a(2) =66a(3) =244a(4) =906a(5) =3372a(6) =12566a(7) =46860a(8) =174810a(9) =652252a(10) =2433942a(11) =9083004a(12) =33897050a(13) =126503148a(14) =472111446a(15) =1761934444a(16) =6575609946a(17) =24540472572a(18) =91586214806a(19) =341804255580

External references