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, -1, 1), (0, 1, 0), (1, 1, -1)}.
A148201
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, -1, 1), (0, 1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =34a(6) =115a(7) =381a(8) =1382a(9) =5021a(10) =19107a(11) =73516a(12) =290271a(13) =1160122a(14) =4711298a(15) =19347457a(16) =80345025a(17) =336732077a(18) =1423193019a(19) =6060568351a(20) =25982989222a(21) =112079577365a(22) =486135477158
External references
- oeis: A148201