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, 0, 1), (-1, 1, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
A149487
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, 0, 1), (-1, 1, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =60a(5) =241a(6) =1152a(7) =5047a(8) =24522a(9) =112283a(10) =550476a(11) =2585230a(12) =12743808a(13) =60807446a(14) =300821244a(15) =1450713881a(16) =7194489294a(17) =34955715150a(18) =173659372472a(19) =848372256917
External references
- oeis: A149487