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, -1), (1, 0, 1), (1, 1, -1)}.
A149371
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, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =46a(5) =161a(6) =679a(7) =2679a(8) =11335a(9) =46123a(10) =202969a(11) =861581a(12) =3802695a(13) =16362599a(14) =73645207a(15) =323694943a(16) =1459832206a(17) =6466787674a(18) =29501513081a(19) =132348273267a(20) =604673867966
External references
- oeis: A149371