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, 0, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
A149795
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, 0, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =85a(5) =369a(6) =1695a(7) =7765a(8) =36307a(9) =170317a(10) =807765a(11) =3841717a(12) =18383799a(13) =88208733a(14) =424946247a(15) =2051518085a(16) =9931383559a(17) =48162942355a(18) =234043500973
External references
- oeis: A149795