The number of walks from (0,0,0) to (n,n,n) with steps that increment one to three coordinates and having the property that no two consecutive steps are orthogonal.

A171158

The number of walks from (0,0,0) to (n,n,n) with steps that increment one to three coordinates and having the property that no two consecutive steps are orthogonal.

Terms

    a(0) =1a(1) =1a(2) =19a(3) =235a(4) =3181a(5) =44725a(6) =648439a(7) =9614329a(8) =145020445a(9) =2217212539a(10) =34269961873a(11) =534449721793

External references