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, 1), (0, 1, 0), (1, -1, -1), (1, 1, 0)}.
A150088
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, 1), (0, 1, 0), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =66a(5) =243a(6) =930a(7) =3676a(8) =14903a(9) =61584a(10) =258894a(11) =1103447a(12) =4758012a(13) =20732432a(14) =91124592a(15) =403681327a(16) =1800752730a(17) =8081803201a(18) =36474901389a(19) =165435268106a(20) =753751636931
External references
- oeis: A150088