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, 1), (-1, 1, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149805
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, 1), (-1, 1, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =91a(5) =385a(6) =1875a(7) =8443a(8) =41447a(9) =192883a(10) =951665a(11) =4515935a(12) =22354617a(13) =107416869a(14) =532944409a(15) =2582917203a(16) =12836022709a(17) =62593137297a(18) =311438717695
External references
- oeis: A149805