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, 1), (-1, 1, -1), (0, 1, 0), (1, -1, 0)}.
A148129
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, 1), (-1, 1, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =26a(6) =75a(7) =231a(8) =714a(9) =2253a(10) =7439a(11) =24739a(12) =83518a(13) =290505a(14) =1020477a(15) =3617151a(16) =12988441a(17) =47028018a(18) =171707245a(19) =633525246a(20) =2353982342a(21) =8798512258a(22) =33091091756a(23) =125118844853a(24) =475659961733
External references
- oeis: A148129