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), (-1, 1, 1), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
A150418
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), (-1, 1, 1), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =95a(5) =380a(6) =1597a(7) =6740a(8) =29198a(9) =127139a(10) =561463a(11) =2489928a(12) =11140536a(13) =50028721a(14) =225990649a(15) =1023987562a(16) =4659366057a(17) =21256295772a(18) =97278163016a(19) =446166794259
External references
- oeis: A150418