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A137853 Triangle read by rows: row sums give natural numbers A000027. 1
1, 0, 2, 1, 2, 0, 1, 0, 3, 0, 0, 2, 3, 0, 0, 1, 2, 3, 0, 0, 0, 1, 2, 0, 4, 0, 0, 0, 1, 0, 3, 4, 0, 0, 0, 0, 0, 2, 3, 4, 0, 0, 0, 0, 0, 1, 2, 3, 4, 0, 0, 0, 0, 0, 0, 1, 2, 3, 0, 5, 0, 0, 0, 0, 0, 0, 1, 2, 0, 4, 5, 0, 0, 0, 0, 0, 0, 0, 1, 0, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Each row contains a series of consecutive numbers. There is a diagonal pattern of zeros in the left part of the table.
LINKS
EXAMPLE
1 = 1
0+2 = 2
1+2+0 = 3
1+0+3+0 = 4
0+2+3+0+0 = 5
1+2+3+0+0+0 = 6
1+2+0+4+0+0+0 = 7
1+0+3+4+0+0+0+0 = 8
0+2+3+4+0+0+0+0+0 = 9
CROSSREFS
Cf. A000027.
Sequence in context: A287418 A125925 A340795 * A213890 A226460 A358360
KEYWORD
nonn,tabl
AUTHOR
Mats Granvik, Feb 14 2008
STATUS
approved

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Last modified May 19 00:35 EDT 2024. Contains 372666 sequences. (Running on oeis4.)