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, -1), (-1, 0, 1), (-1, 1, 1), (1, 0, 0)}.
A148550
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, -1), (-1, 0, 1), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =21a(5) =44a(6) =189a(7) =433a(8) =1947a(9) =4754a(10) =21843a(11) =55593a(12) =258846a(13) =678794a(14) =3197214a(15) =8581819a(16) =40729683a(17) =111318770a(18) =531516095a(19) =1474157217a(20) =7074437422a(21) =19861550204a(22) =95678831934a(23) =271365160703
External references
- oeis: A148550