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, -1), (1, -1, -1), (1, 1, 1)}.
A149078
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, -1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =7a(4) =28a(5) =70a(6) =244a(7) =751a(8) =2500a(9) =8266a(10) =28164a(11) =92418a(12) =327552a(13) =1084792a(14) =3864464a(15) =13168347a(16) =46660372a(17) =162432234a(18) =577642588a(19) =2013423778a(20) =7250734160a(21) =25353048772a(22) =91650888464a(23) =323761950406
External references
- oeis: A149078