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, 1), (-1, 1, -1), (0, 0, 1), (1, 0, 0), (1, 1, 1)}.
A151121
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, 1), (-1, 1, -1), (0, 0, 1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =193a(5) =856a(6) =3897a(7) =17982a(8) =83990a(9) =395574a(10) =1875629a(11) =8941132a(12) =42813265a(13) =205754225a(14) =991927315a(15) =4794739938a(16) =23230151537a(17) =112774603150a(18) =548452704158
External references
- oeis: A151121