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, 0), (1, 0, 0), (1, 1, 1)}.
A151117
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, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =193a(5) =851a(6) =3839a(7) =17545a(8) =81109a(9) =378176a(10) =1775372a(11) =8381349a(12) =39755815a(13) =189318190a(14) =904620647a(15) =4335361919a(16) =20830715266a(17) =100316712526a(18) =484090425939
External references
- oeis: A151117