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), (0, 0, -1), (0, 1, 0), (0, 1, 1), (1, 0, 0)}.
A151072
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), (0, 0, -1), (0, 1, 0), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =3a(2) =10a(3) =39a(4) =163a(5) =698a(6) =3070a(7) =13816a(8) =63018a(9) =290454a(10) =1351773a(11) =6339159a(12) =29904498a(13) =141807235a(14) =675482905a(15) =3229778815a(16) =15493756268a(17) =74541916820a(18) =359542527108
External references
- oeis: A151072