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)}.
A148284
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) =2a(3) =5a(4) =12a(5) =32a(6) =97a(7) =282a(8) =870a(9) =2870a(10) =9215a(11) =30571a(12) =106328a(13) =361324a(14) =1256426a(15) =4523643a(16) =15971258a(17) =57343994a(18) =211680313a(19) =767950799a(20) =2823061650a(21) =10618284888a(22) =39319704544a(23) =147172286980a(24) =561739600196
External references
- oeis: A148284