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), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
A150246
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), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =84a(5) =349a(6) =1489a(7) =6522a(8) =29167a(9) =131937a(10) =604928a(11) =2795191a(12) =13026035a(13) =61071104a(14) =287955729a(15) =1364135422a(16) =6488835986a(17) =30978176466a(18) =148354824082a(19) =712491943840
External references
- oeis: A150246