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), (-1, 1, 0), (0, 0, -1), (1, 0, 1)}.
A149235
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), (-1, 1, 0), (0, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =34a(5) =123a(6) =435a(7) =1517a(8) =5876a(9) =22077a(10) =82943a(11) =329771a(12) =1289428a(13) =5030383a(14) =20389326a(15) =81653403a(16) =326499226a(17) =1341046419a(18) =5460664651a(19) =22207889609a(20) =92128656644a(21) =379717560749
External references
- oeis: A149235