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, -1, 0), (1, 0, 1)}.
A148755
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, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =28a(5) =77a(6) =328a(7) =1032a(8) =4561a(9) =15405a(10) =69769a(11) =247393a(12) =1138185a(13) =4185511a(14) =19468674a(15) =73609812a(16) =345276471a(17) =1334269657a(18) =6299899585a(19) =24782227361a(20) =117622225218a(21) =469582616810
External references
- oeis: A148755