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, 1, 1), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
A150814
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, 1, 1), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =135a(5) =586a(6) =2666a(7) =12167a(8) =56723a(9) =265396a(10) =1255715a(11) =5959989a(12) =28476912a(13) =136421495a(14) =656378106a(15) =3164968325a(16) =15306966507a(17) =74162871400a(18) =360110619495
External references
- oeis: A150814