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, 0, -1), (1, 1, 0)}.
A149339
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, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =40a(5) =151a(6) =573a(7) =2233a(8) =9134a(9) =37319a(10) =156741a(11) =667054a(12) =2860003a(13) =12451013a(14) =54546675a(15) =240872936a(16) =1072716219a(17) =4799044185a(18) =21612759421a(19) =97809065210a(20) =444495198056
External references
- oeis: A149339