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, 1), (-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149751
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, 1), (-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =81a(5) =331a(6) =1567a(7) =6917a(8) =32993a(9) =151045a(10) =725821a(11) =3392889a(12) =16395681a(13) =77672623a(14) =376945023a(15) =1802187471a(16) =8775092203a(17) =42233825271a(18) =206187157371a(19) =997354857219
External references
- oeis: A149751