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, 0), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150967
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, 0), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =153a(5) =702a(6) =3185a(7) =14650a(8) =69150a(9) =325689a(10) =1541121a(11) =7388523a(12) =35382543a(13) =169913378a(14) =821846528a(15) =3973759409a(16) =19247428324a(17) =93639904181a(18) =455548738095
External references
- oeis: A150967