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, 0, 1), (-1, 1, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
A149011
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, 0, 1), (-1, 1, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =34a(5) =125a(6) =498a(7) =1995a(8) =8275a(9) =34635a(10) =147828a(11) =635203a(12) =2764589a(13) =12100073a(14) =53407392a(15) =236872232a(16) =1056879553a(17) =4734289388a(18) =21303849938a(19) =96179139060a(20) =435755416559
External references
- oeis: A149011