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, 0), (0, -1, 1), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.
A148842
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, 0), (0, -1, 1), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =27a(5) =93a(6) =341a(7) =1295a(8) =5052a(9) =20209a(10) =82190a(11) =339801a(12) =1422276a(13) =6020724a(14) =25727971a(15) =110854465a(16) =481147223a(17) =2101771068a(18) =9234216691a(19) =40779355432a(20) =180925623756a(21) =806086402420
External references
- oeis: A148842