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, 1, -1), (1, 0, 1), (1, 1, -1)}.
A148584
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, 1, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =54a(6) =176a(7) =537a(8) =1784a(9) =5722a(10) =19537a(11) =64705a(12) =224232a(13) =759634a(14) =2664709a(15) =9169550a(16) =32513528a(17) =113285030a(18) =404655671a(19) =1424050509a(20) =5118569752a(21) =18154687578a(22) =65620267420a(23) =234299793658a(24) =850506773424
External references
- oeis: A148584