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, 1, -1), (0, 1, 1), (1, 0, -1)}.
A148625
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, 1, -1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =22a(5) =54a(6) =212a(7) =601a(8) =2419a(9) =7391a(10) =30803a(11) =98465a(12) =417611a(13) =1395410a(14) =5971378a(15) =20544578a(16) =89140376a(17) =313095273a(18) =1369580635a(19) =4915365432a(20) =21606796900a(21) =78780031560a(22) =348839361590
External references
- oeis: A148625