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), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
A150474
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), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =99a(5) =405a(6) =1714a(7) =7427a(8) =32737a(9) =146383a(10) =661869a(11) =3020265a(12) =13889929a(13) =64291101a(14) =299260749a(15) =1399700354a(16) =6574435846a(17) =30995358969a(18) =146611032296a(19) =695533590390
External references
- oeis: A150474