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, 0), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150444
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, 0), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =102a(5) =411a(6) =1835a(7) =7893a(8) =36351a(9) =162548a(10) =762138a(11) =3491511a(12) =16564826a(13) =77136405a(14) =369070850a(15) =1739073648a(16) =8372815451a(17) =39802063614a(18) =192546293264a(19) =921550475054
External references
- oeis: A150444