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, 1), (1, -1, 0), (1, 0, -1)}.
A149060
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, 1), (1, -1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =38a(5) =147a(6) =587a(7) =2406a(8) =10215a(9) =43810a(10) =191420a(11) =846279a(12) =3777172a(13) =17035113a(14) =77322677a(15) =353531629a(16) =1625496758a(17) =7511140978a(18) =34874728630a(19) =162546596481a(20) =760497205550
External references
- oeis: A149060