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), (-1, 1, 0), (0, 0, 1), (1, -1, 1), (1, 0, -1)}.
A148332
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), (-1, 1, 0), (0, 0, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =42a(6) =140a(7) =481a(8) =1740a(9) =6517a(10) =25071a(11) =98909a(12) =398029a(13) =1630133a(14) =6776780a(15) =28545990a(16) =121634875a(17) =523592344a(18) =2274403486a(19) =9959936977a(20) =43935043231a(21) =195083730751a(22) =871408143675
External references
- oeis: A148332