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, 0), (-1, 0, -1), (0, 0, 1), (1, -1, 1), (1, 1, 0)}.
A150189
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, 0), (-1, 0, -1), (0, 0, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =77a(5) =300a(6) =1205a(7) =4953a(8) =20803a(9) =88398a(10) =380885a(11) =1655075a(12) =7254932a(13) =32022552a(14) =142171030a(15) =634730173a(16) =2846078283a(17) =12817275806a(18) =57925380570a(19) =262668322805
External references
- oeis: A150189