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, 0), (0, 1, -1), (1, 0, 0), (1, 1, -1)}.
A148042
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, 0), (0, 1, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =19a(6) =57a(7) =165a(8) =535a(9) =1700a(10) =5761a(11) =19596a(12) =69357a(13) =247143a(14) =904969a(15) =3344222a(16) =12578803a(17) =47771691a(18) =183784047a(19) =713153652a(20) =2795057882a(21) =11038817438a(22) =43945343994a(23) =176118626035a(24) =710510882943
External references
- oeis: A148042