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, -1), (-1, 0, 0), (0, -1, 1), (0, 1, 0), (1, -1, 0)}.
A148558
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, -1), (-1, 0, 0), (0, -1, 1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =18a(5) =47a(6) =151a(7) =444a(8) =1474a(9) =4751a(10) =15980a(11) =54263a(12) =188405a(13) =654422a(14) =2326335a(15) =8306683a(16) =29854080a(17) =108664545a(18) =397687346a(19) =1460169528a(20) =5417588114a(21) =20172041308a(22) =75314119276a(23) =283455950368
External references
- oeis: A148558