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, 0, 0), (0, 1, 0), (0, 1, 1), (1, -1, -1)}.
A149899
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, 0, 0), (0, 1, 0), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =47a(5) =159a(6) =565a(7) =2063a(8) =7865a(9) =30157a(10) =118017a(11) =469064a(12) =1892519a(13) =7681288a(14) =31525714a(15) =130593424a(16) =544754098a(17) =2284273316a(18) =9645909083a(19) =40963272701a(20) =174700576880a(21) =748259285162
External references
- oeis: A149899