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), (-1, 1, 1), (1, 0, 1), (1, 1, -1)}.
A148919
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), (-1, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =36a(5) =115a(6) =529a(7) =1895a(8) =8855a(9) =33729a(10) =160727a(11) =637268a(12) =3069226a(13) =12527125a(14) =60683485a(15) =253007532a(16) =1231455946a(17) =5218227906a(18) =25498514854a(19) =109450738571a(20) =536404268553
External references
- oeis: A148919