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, 0, -1), (0, 1, 1), (1, -1, 1)}.
A148964
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, 0, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =31a(5) =105a(6) =380a(7) =1424a(8) =5451a(9) =21236a(10) =84023a(11) =336837a(12) =1366529a(13) =5597986a(14) =23129943a(15) =96272760a(16) =403427906a(17) =1701008029a(18) =7211480972a(19) =30724854989a(20) =131497271065a(21) =565125754561
External references
- oeis: A148964