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, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 0)}.
A148279
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, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =16a(5) =46a(6) =167a(7) =495a(8) =2102a(9) =7198a(10) =29506a(11) =101661a(12) =447830a(13) =1662061a(14) =7152135a(15) =26571095a(16) =119610098a(17) =465593444a(18) =2056854630a(19) =7994549636a(20) =36480375305a(21) =146548393847a(22) =658189128755
External references
- oeis: A148279