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, 0, 0), (-1, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148484
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, 0, 0), (-1, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =20a(5) =77a(6) =307a(7) =1253a(8) =5290a(9) =22909a(10) =100980a(11) =451724a(12) =2048087a(13) =9378510a(14) =43297388a(15) =201407415a(16) =942923110a(17) =4437792925a(18) =20985159916a(19) =99656902686a(20) =474991016902
External references
- oeis: A148484