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, 1, 1), (0, 0, 1), (1, 0, -1)}.
A148088
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, 1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =24a(6) =68a(7) =191a(8) =571a(9) =1723a(10) =5293a(11) =16671a(12) =53094a(13) =172307a(14) =563812a(15) =1861398a(16) =6205635a(17) =20824194a(18) =70511559a(19) =240014778a(20) =821599856a(21) =2827041912a(22) =9769219609a(23) =33929479056a(24) =118266254690a(25) =413775330014
External references
- oeis: A148088