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, 1), (-1, 0, 0), (0, 0, -1), (0, 1, 0), (1, -1, 0)}.
A148132
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, 1), (-1, 0, 0), (0, 0, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =28a(6) =77a(7) =228a(8) =692a(9) =2160a(10) =6879a(11) =22528a(12) =75430a(13) =254868a(14) =875874a(15) =3055683a(16) =10765198a(17) =38352888a(18) =137848862a(19) =499998280a(20) =1829241456a(21) =6733795838a(22) =24970420936a(23) =93195229701a(24) =349695790406
External references
- oeis: A148132