Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149684
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =67a(5) =263a(6) =1113a(7) =4701a(8) =20211a(9) =87933a(10) =386999a(11) =1716359a(12) =7655605a(13) =34367961a(14) =155015815a(15) =702280467a(16) =3192664653a(17) =14564924725a(18) =66637386979a(19) =305681652355
External references
- oeis: A149684