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, 1, 0), (1, -1, 0), (1, 0, -1)}.
A148304
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, 1, 0), (1, -1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =38a(6) =122a(7) =397a(8) =1376a(9) =4923a(10) =17982a(11) =67758a(12) =259896a(13) =1013405a(14) =4024745a(15) =16169249a(16) =65806673a(17) =270873731a(18) =1125025971a(19) =4717447790a(20) =19937273837a(21) =84872224410a(22) =363857572296
External references
- oeis: A148304