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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
A151088
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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =42a(4) =172a(5) =731a(6) =3190a(7) =14185a(8) =64088a(9) =293148a(10) =1353721a(11) =6301445a(12) =29532269a(13) =139193588a(14) =659208293a(15) =3135042374a(16) =14964198986a(17) =71655310992a(18) =344084815185
External references
- oeis: A151088