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), (-1, 1, 0), (1, 0, -1), (1, 0, 1)}.
A149293
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), (-1, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =46a(5) =147a(6) =647a(7) =2313a(8) =10514a(9) =39751a(10) =184331a(11) =723889a(12) =3402792a(13) =13737157a(14) =65202392a(15) =268711423a(16) =1284588076a(17) =5379748961a(18) =25859980743a(19) =109703697497a(20) =529631702686
External references
- oeis: A149293