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, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150956
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, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =159a(5) =691a(6) =3241a(7) =14777a(8) =70338a(9) =328419a(10) =1578218a(11) =7479599a(12) =36169448a(13) =173094420a(14) =840788993a(15) =4051611779a(16) =19746329485a(17) =95639637883a(18) =467332945325
External references
- oeis: A150956