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, 0), (-1, -1, 1), (0, 1, -1), (1, 0, 0), (1, 1, 0)}.
A150085
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, 0), (-1, -1, 1), (0, 1, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =65a(5) =241a(6) =905a(7) =3599a(8) =14425a(9) =59534a(10) =249329a(11) =1056921a(12) =4552398a(13) =19735824a(14) =86589754a(15) =382354053a(16) =1700890992a(17) =7617683252a(18) =34282253718a(19) =155195308290a(20) =705421980080
External references
- oeis: A150085