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, 0), (1, 0, 1), (1, 1, 1)}.
A151209
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, 0), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =53a(4) =243a(5) =1075a(6) =5051a(7) =23183a(8) =110405a(9) =517269a(10) =2484517a(11) =11792641a(12) =56977377a(13) =272851117a(14) =1324046545a(15) =6381308549a(16) =31069554259a(17) =150465126731a(18) =734529518555
External references
- oeis: A151209