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), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
A150079
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), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =68a(5) =243a(6) =970a(7) =3741a(8) =15636a(9) =63207a(10) =270422a(11) =1127616a(12) =4913616a(13) =20943040a(14) =92434154a(15) =400506478a(16) =1785534204a(17) =7835181876a(18) =35208226011a(19) =156068030420a(20) =705850854116
External references
- oeis: A150079