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, 0), (-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 0)}.
A148570
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, 0), (-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =19a(5) =52a(6) =177a(7) =572a(8) =2084a(9) =7356a(10) =28195a(11) =105124a(12) =417624a(13) =1619699a(14) =6604938a(15) =26401947a(16) =109851101a(17) =449617572a(18) =1901123505a(19) =7928975462a(20) =33972903518a(21) =143863241757a(22) =623248679117
External references
- oeis: A148570