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), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150809
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), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =134a(5) =583a(6) =2635a(7) =12013a(8) =55748a(9) =260199a(10) =1225770a(11) =5807958a(12) =27657154a(13) =132253448a(14) =634831120a(15) =3056093296a(16) =14753704520a(17) =71388767851a(18) =346141434992
External references
- oeis: A150809