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, 0), (0, 0, 1), (1, -1, -1), (1, 1, -1)}.
A148329
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, 0), (0, 0, 1), (1, -1, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =42a(6) =132a(7) =427a(8) =1461a(9) =5149a(10) =18208a(11) =66167a(12) =245809a(13) =916554a(14) =3472325a(15) =13336423a(16) =51381259a(17) =200314770a(18) =788549887a(19) =3109894305a(20) =12375535543a(21) =49619709706a(22) =199200086118a(23) =805276630442
External references
- oeis: A148329