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), (0, 1, 0), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A150640
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), (0, 1, 0), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =116a(5) =518a(6) =2389a(7) =11220a(8) =53442a(9) =257054a(10) =1245629a(11) =6069967a(12) =29708772a(13) =145907273a(14) =718561088a(15) =3546635941a(16) =17537173481a(17) =86846891342a(18) =430617149461
External references
- oeis: A150640