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, 1, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
A149342
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, 1, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =41a(5) =155a(6) =583a(7) =2217a(8) =8813a(9) =35117a(10) =140272a(11) =571017a(12) =2338774a(13) =9587488a(14) =39650883a(15) =164907088a(16) =686754386a(17) =2872729884a(18) =12067557814a(19) =50778198371a(20) =214221469713a(21) =906453747063
External references
- oeis: A149342