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, 0, 1), (-1, 1, 0), (0, -1, 1), (0, 0, 1), (1, 0, -1)}.
A148321
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, 0, 1), (-1, 1, 0), (0, -1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =40a(6) =127a(7) =418a(8) =1424a(9) =5031a(10) =18209a(11) =67366a(12) =254186a(13) =974761a(14) =3791854a(15) =14943935a(16) =59552233a(17) =239744109a(18) =974027603a(19) =3989625078a(20) =16464722934a(21) =68411771010a(22) =286027517137
External references
- oeis: A148321