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, 1, 1), (0, 1, -1), (1, 0, -1), (1, 0, 0)}.
A148396
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, 1, 1), (0, 1, -1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =53a(6) =194a(7) =706a(8) =2725a(9) =10743a(10) =42930a(11) =176429a(12) =736356a(13) =3103055a(14) =13254641a(15) =57222484a(16) =249217292a(17) =1093491029a(18) =4832787312a(19) =21511601604a(20) =96258301287a(21) =432911365017
External references
- oeis: A148396