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, 0, 0), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
A148868
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, 0, 0), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =29a(5) =92a(6) =341a(7) =1251a(8) =4935a(9) =18810a(10) =75627a(11) =303867a(12) =1256851a(13) =5142386a(14) =21607574a(15) =90560658a(16) =386107734a(17) =1639374869a(18) =7073463130a(19) =30412887858a(20) =132386786861a(21) =574952542100
External references
- oeis: A148868