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), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
A149323
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), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =37a(5) =152a(6) =574a(7) =2069a(8) =8899a(9) =35891a(10) =140144a(11) =615525a(12) =2574434a(13) =10492758a(14) =46743782a(15) =200030677a(16) =837407785a(17) =3767614082a(18) =16377824578a(19) =69844474502a(20) =316532390515
External references
- oeis: A149323