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, 0, 0), (1, -1, -1), (1, -1, 1), (1, 1, 0)}.
A149132
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, 0, 0), (1, -1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =105a(6) =401a(7) =1395a(8) =5432a(9) =20045a(10) =79267a(11) =302963a(12) =1214290a(13) =4751129a(14) =19259900a(15) =76675769a(16) =313691094a(17) =1265724443a(18) =5216819041a(19) =21274180331a(20) =88222413102a(21) =362852198453
External references
- oeis: A149132