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), (0, -1, 0), (0, 1, -1), (1, 0, 1)}.
A148794
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), (0, -1, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =25a(5) =83a(6) =275a(7) =979a(8) =3564a(9) =13189a(10) =49225a(11) =187797a(12) =727867a(13) =2846769a(14) =11196901a(15) =44435404a(16) =178225558a(17) =719598179a(18) =2917436622a(19) =11883144952a(20) =48717865972a(21) =200814429820a(22) =830562896750
External references
- oeis: A148794