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, 1), (-1, 0, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.
A148468
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, 1), (-1, 0, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =19a(5) =63a(6) =228a(7) =853a(8) =3303a(9) =13129a(10) =53284a(11) =219809a(12) =920251a(13) =3898392a(14) =16683106a(15) =72047117a(16) =313513987a(17) =1373636939a(18) =6054897529a(19) =26832276225a(20) =119480099586a(21) =534329193514
External references
- oeis: A148468