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), (0, 1, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A151208
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), (0, 1, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =54a(4) =252a(5) =1205a(6) =5838a(7) =28512a(8) =140142a(9) =691450a(10) =3422482a(11) =16976693a(12) =84352809a(13) =419663169a(14) =2089896141a(15) =10415635115a(16) =51940595958a(17) =259142066138
External references
- oeis: A151208