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), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
A150578
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), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =109a(5) =449a(6) =1995a(7) =8648a(8) =39542a(9) =177391a(10) =824142a(11) =3780180a(12) =17757683a(13) =82638051a(14) =391512994a(15) =1840788102a(16) =8778125385a(17) =41599169813a(18) =199370832862a(19) =950717604657
External references
- oeis: A150578