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, 0, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
A148909
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, 0, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =32a(5) =106a(6) =432a(7) =1606a(8) =6832a(9) =26873a(10) =116447a(11) =477181a(12) =2099405a(13) =8832030a(14) =39290666a(15) =168635917a(16) =756571701a(17) =3295972568a(18) =14889850448a(19) =65634238333a(20) =298171048021
External references
- oeis: A148909