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, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
A150885
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, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =150a(5) =687a(6) =3260a(7) =15535a(8) =75200a(9) =365065a(10) =1786315a(11) =8758688a(12) =43134180a(13) =212743678a(14) =1052015189a(15) =5207997317a(16) =25824475180a(17) =128160594114a(18) =636719791109
External references
- oeis: A150885