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, 0, 0), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149614
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, 0, 0), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =63a(5) =241a(6) =1029a(7) =4235a(8) =18455a(9) =78715a(10) =348351a(11) =1519343a(12) =6802653a(13) =30136875a(14) =136132599a(15) =610143777a(16) =2774845257a(17) =12547858643a(18) =57373751109a(19) =261245486761
External references
- oeis: A149614