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), (0, -1, 1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A150860
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), (0, -1, 1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =142a(5) =648a(6) =3023a(7) =14303a(8) =68375a(9) =329159a(10) =1594484a(11) =7758744a(12) =37897926a(13) =185697956a(14) =912232185a(15) =4491049519a(16) =22150504070a(17) =109418279581a(18) =541221305601
External references
- oeis: A150860