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, 1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
A150557
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, 1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =106a(5) =433a(6) =1840a(7) =7940a(8) =34600a(9) =152415a(10) =677408a(11) =3026920a(12) =13601908a(13) =61423330a(14) =278412139a(15) =1266274777a(16) =5777664180a(17) =26431866609a(18) =121211063067a(19) =557094467005
External references
- oeis: A150557