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), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
A148985
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), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =32a(5) =115a(6) =442a(7) =1744a(8) =7051a(9) =29126a(10) =122239a(11) =519591a(12) =2234239a(13) =9694435a(14) =42403432a(15) =186764362a(16) =827508472a(17) =3686022642a(18) =16495984895a(19) =74131461638a(20) =334391209125
External references
- oeis: A148985