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, -1), (0, -1, 1), (0, 1, 1), (1, 1, -1)}.
A148893
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, -1), (0, -1, 1), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =31a(5) =102a(6) =392a(7) =1454a(8) =5890a(9) =23160a(10) =95273a(11) =392398a(12) =1649111a(13) =6924724a(14) =29550882a(15) =126827458a(16) =547935967a(17) =2378179558a(18) =10398410511a(19) =45643035246a(20) =201086177071a(21) =889753284580
External references
- oeis: A148893