login
A167851
Triangle read by rows in which each row contains a finite triangle as shown below.
2
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1
OFFSET
1,1
COMMENTS
See also A159800, A164002, A167850 and A167852.
EXAMPLE
The main triangle begins:
1,
1,1,1,
1,1,1,1,1,1,
1,1,1,1,0,1,1,1,1,1,
1,1,1,1,0,1,1,0,0,1,1,1,1,1,1,
1,1,1,1,0,1,1,0,0,1,1,0,0,0,1,1,1,1,1,1,1,
1,1,1,1,0,1,1,0,0,1,1,0,1,0,1,1,0,0,0,0,1,1,1,1,1,1,1,1,
1,1,1,1,0,1,1,0,0,1,1,0,1,0,1,1,0,1,1,0,1,1,0,0,0,0,0,1,1,1,1,1,1,1,1,1,
In which row 1 contains a vertex, only:
1,
Row 2 contains the triangle:
1,
1,1,
Row 3 contains the triangle:
1,
1,1,
1,1,1,
Row 4 contains the triangle:
1,
1,1,
1,0,1,
1,1,1,1,
Row 5 contains the triangle:
1,
1,1,
1,0,1,
1,0,0,1,
1,1,1,1,1,
Row 6 contains the triangle:
1,
1,1,
1,0,1,
1,0,0,1,
1,0,0,0,1,
1,1,1,1,1,1,
Row 7 contains the triangle:
1,
1,1,
1,0,1,
1,0,0,1,
1,0,1,0,1,
1,0,0,0,0,1,
1,1,1,1,1,1,1,
Row 8 contains the triangle:
1,
1,1,
1,0,1,
1,0,0,1,
1,0,1,0,1,
1,0,1,1,0,1,
1,0,0,0,0,0,1,
1,1,1,1,1,1,1,1,
Row 9 contains the triangle:
1,
1,1,
1,0,1,
1,0,0,1,
1,0,1,0,1,
1,0,1,1,0,1,
1,0,1,1,1,0,1,
1,0,0,0,0,0,0,1,
1,1,1,1,1,1,1,1,1,
Row 10 contains the triangle:
1,
1,1,
1,0,1,
1,0,0,1,
1,0,1,0,1,
1,0,1,1,0,1,
1,0,1,0,1,0,1,
1,0,1,1,1,1,0,1,
1,0,0,0,0,0,0,0,1,
1,1,1,1,1,1,1,1,1,1,
And so on...
CROSSREFS
KEYWORD
easy,nonn,tabf
AUTHOR
Omar E. Pol, Nov 13 2009
STATUS
approved