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, 0), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
A148594
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, 0), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =57a(6) =196a(7) =652a(8) =2305a(9) =8187a(10) =29938a(11) =110468a(12) =415523a(13) =1576423a(14) =6054903a(15) =23444901a(16) =91538346a(17) =359866575a(18) =1424136635a(19) =5667087376a(20) =22676094964a(21) =91152587752a(22) =368075554103
External references
- oeis: A148594