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, 0), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
A148204
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, 0), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =35a(6) =113a(7) =375a(8) =1310a(9) =4703a(10) =17330a(11) =65209a(12) =250114a(13) =973787a(14) =3843412a(15) =15348830a(16) =61943321a(17) =252282099a(18) =1036030465a(19) =4286325796a(20) =17852945250a(21) =74812425886a(22) =315247690475
External references
- oeis: A148204