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, -1, 0), (-1, 1, -1), (1, 0, 1)}.
A148044
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, -1, 0), (-1, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =10a(5) =20a(6) =58a(7) =119a(8) =418a(9) =960a(10) =3058a(11) =6996a(12) =25166a(13) =61594a(14) =204930a(15) =496191a(16) =1809682a(17) =4597480a(18) =15689026a(19) =39347480a(20) =144815566a(21) =377111538a(22) =1308570866a(23) =3361896292a(24) =12453614038a(25) =33008818730a(26) =115909050138a(27) =303076342734
External references
- oeis: A148044