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, 0, -1), (1, 0, 0)}.
A148235
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, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =35a(6) =118a(7) =341a(8) =1222a(9) =3871a(10) =14095a(11) =46182a(12) =172636a(13) =588711a(14) =2213167a(15) =7681235a(16) =29298637a(17) =104046951a(18) =397960363a(19) =1428060581a(20) =5509869249a(21) =20062858933a(22) =77534482146a(23) =284269944662
External references
- oeis: A148235