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A164002 Triangle read by rows in which each row contains a finite triangle as shown below. 4
1, 1, 1, 1, 1, 2, 2, 1, 2, 1, 1, 2, 2, 2, 3, 2, 1, 2, 2, 1, 1, 2, 2, 2, 3, 2, 2, 3, 3, 2, 1, 2, 2, 2, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 3, 2, 3, 4, 3, 2, 1, 2, 3, 3, 2, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 3, 3, 4, 5, 4, 3, 2, 3, 4, 4, 3, 2, 1, 2, 3, 3, 3, 2, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 3, 3, 4, 5, 4, 3, 3, 4, 5, 5, 4, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
COMMENTS
See also A159800.
LINKS
EXAMPLE
The main triangle begins:
1
1,1,1
1,2,2,1,2,1
1,2,2,2,3,2,1,2,2,1
1,2,2,2,3,2,2,3,3,2,1,2,2,2,1
1,2,2,3,3,3,3,4,4,3,2,3,4,3,2,1,2,3,3,2,1
1,2,2,3,3,3,3,4,4,3,3,4,5,4,3,2,3,4,4,3,2,1,2,3,3,3,2,1
1,2,2,3,3,3,3,4,4,3,3,4,5,4,3,3,4,5,5,4,3,2,3,4,4,4,3,2,1,2,3,3,3,3,2,1
In which row 1 contains a vertex, only:
1
Row 2 contains the triangle:
1
1,1
Row 3 contains the triangle:
1
2,2
1,2,1
Row 4 contains the triangle:
1
2,2
2,3,2
1,2,2,1
Row 5 contains the triangle:
1
2,2
2,3,2
2,3,3,2
1,2,2,2,1
Row 6 contains the triangle:
1
2,2
3,3,3
3,4,4,3
2,3,4,3,2
1,2,3,3,2,1
Row 7 contains the triangle:
1
2,2
3,3,3
3,4,4,3
3,4,5,4,3
2,3,4,4,3,2
1,2,3,3,3,2,1
Row 8 contains the triangle:
1
2,2
3,3,3
3,4,4,3
3,4,5,4,3
3,4,5,5,4,3
2,3,4,4,4,3,2
1,2,3,3,3,3,2,1
Row 9 contains the triangle:
1
2,2
3,3,3
4,4,4,4
4,5,5,5,4
4,5,6,6,5,4
3,4,5,6,5,4,3
2,3,4,5,5,4,3,2
1,2,3,4,4,4,3,2,1
Row 10 contains the triangle:
1
2,2
3,3,3
4,4,4,4
4,5,5,5,4
4,5,6,6,5,4
4,5,6,7,6,5,4
3,4,5,6,6,5,4,3
2,3,4,5,5,5,4,3,2
1,2,3,4,4,4,4,3,2,1
And so on...
CROSSREFS
Sequence in context: A270647 A261126 A097456 * A322156 A332278 A182596
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Nov 10 2009
STATUS
approved

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Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)