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, 0, 1), (1, 0, 0), (1, 1, -1)}.
A150193
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, 0, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =78a(5) =308a(6) =1265a(7) =5348a(8) =23112a(9) =101665a(10) =453631a(11) =2047531a(12) =9331915a(13) =42881889a(14) =198431612a(15) =923766634a(16) =4323106334a(17) =20325027924a(18) =95946992266a(19) =454570567870
External references
- oeis: A150193