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), (0, 1, -1), (1, -1, -1), (1, 0, 1)}.
A148774
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), (0, 1, -1), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =22a(5) =80a(6) =265a(7) =888a(8) =3336a(9) =12249a(10) =45072a(11) =173673a(12) =672941a(13) =2595981a(14) =10244208a(15) =41012730a(16) =162936518a(17) =655570981a(18) =2678127981a(19) =10874155875a(20) =44444744731a(21) =183974555899a(22) =759720059015
External references
- oeis: A148774