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), (1, 0, -1), (1, 0, 0)}.
A148178
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), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =28a(6) =91a(7) =242a(8) =839a(9) =2416a(10) =8782a(11) =26700a(12) =100437a(13) =317981a(14) =1226766a(15) =4010820a(16) =15782053a(17) =52955735a(18) =211754709a(19) =725756163a(20) =2941028924a(21) =10260046434a(22) =42043257062a(23) =148908505647a(24) =615994366991
External references
- oeis: A148178