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, -1), (-1, 1, 1), (0, -1, 1), (1, 0, 0)}.
A148243
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, -1), (-1, 1, 1), (0, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =36a(6) =115a(7) =358a(8) =1162a(9) =3846a(10) =13131a(11) =45774a(12) =160487a(13) =570699a(14) =2038537a(15) =7365489a(16) =26832702a(17) =98727890a(18) =365178878a(19) =1358061230a(20) =5072922935a(21) =19034627200a(22) =71768522621a(23) =271873506868
External references
- oeis: A148243