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, -1, 0), (0, 0, 1), (0, 1, 0), (1, 1, 1)}.
A151090
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, -1, 0), (0, 0, 1), (0, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =43a(4) =175a(5) =731a(6) =3111a(7) =13427a(8) =58591a(9) =257947a(10) =1143943a(11) =5104419a(12) =22896303a(13) =103169899a(14) =466725143a(15) =2118787187a(16) =9648585791a(17) =44060516667a(18) =201709358631a(19) =925531659971
External references
- oeis: A151090