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, -1), (1, 0, 0), (1, 1, 1)}.
A150695
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, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =118a(5) =438a(6) =2086a(7) =8240a(8) =40024a(9) =163876a(10) =803982a(11) =3370502a(12) =16633478a(13) =70916534a(14) =351291562a(15) =1516838702a(16) =7532707726a(17) =32849843834a(18) =163418063036a(19) =718387899206
External references
- oeis: A150695