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, 0), (0, -1, 1), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149438
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, 0), (0, -1, 1), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =46a(5) =176a(6) =695a(7) =2798a(8) =11541a(9) =48329a(10) =204881a(11) =878391a(12) =3799793a(13) =16563455a(14) =72690310a(15) =320873735a(16) =1423746623a(17) =6346395953a(18) =28405424089a(19) =127608745990a(20) =575191857966
External references
- oeis: A149438