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, 0), (0, 0, -1), (0, 1, 0), (1, -1, 1)}.
A148383
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, 0), (0, 0, -1), (0, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =50a(6) =155a(7) =520a(8) =1852a(9) =6689a(10) =24152a(11) =88895a(12) =336276a(13) =1290375a(14) =4970796a(15) =19272883a(16) =75691051a(17) =300545743a(18) =1199594439a(19) =4804949939a(20) =19368329062a(21) =78661855921a(22) =321113507062
External references
- oeis: A148383