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), (-1, 1, 0), (1, 0, -1), (1, 0, 1)}.
A149291
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), (-1, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =46a(5) =145a(6) =641a(7) =2275a(8) =10330a(9) =38683a(10) =179077a(11) =698969a(12) =3277788a(13) =13154295a(14) =62279600a(15) =255360623a(16) =1217775810a(17) =5076594445a(18) =24346635475a(19) =102858261727a(20) =495528611722
External references
- oeis: A149291