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, 1), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
A150805
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, 1), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =133a(5) =579a(6) =2596a(7) =11806a(8) =54379a(9) =252781a(10) =1184050a(11) =5579143a(12) =26424624a(13) =125674028a(14) =599902518a(15) =2872454761a(16) =13791585310a(17) =66375869050a(18) =320130372489
External references
- oeis: A150805