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), (-1, 1, 0), (0, 0, 1), (1, 0, -1)}.
A148292
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), (-1, 1, 0), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =35a(6) =109a(7) =330a(8) =1066a(9) =3545a(10) =12002a(11) =41340a(12) =146669a(13) =520408a(14) =1892267a(15) =6920385a(16) =25633619a(17) =95666879a(18) =361061450a(19) =1367616912a(20) =5237966081a(21) =20117499658a(22) =77914834275a(23) =302809077698
External references
- oeis: A148292