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, 0), (-1, 1, -1), (1, -1, 0), (1, 0, 1)}.
A148610
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, 0), (-1, 1, -1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =53a(6) =202a(7) =573a(8) =2276a(9) =6970a(10) =28580a(11) =91972a(12) =384766a(13) =1287580a(14) =5472167a(15) =18839174a(16) =81030265a(17) =285642073a(18) =1240356821a(19) =4454674973a(20) =19496366549a(21) =71145867213a(22) =313392200589
External references
- oeis: A148610