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, -1), (-1, 1, 1), (1, -1, -1), (1, 0, 1)}.
A148666
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, -1), (-1, 1, 1), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =26a(5) =67a(6) =289a(7) =883a(8) =3939a(9) =12973a(10) =59283a(11) =206203a(12) =953701a(13) =3457009a(14) =16139619a(15) =60317808a(16) =283794508a(17) =1086268906a(18) =5141489214a(19) =20066470430a(20) =95428374560a(21) =378479119402
External references
- oeis: A148666