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A143753 Irregular triangle: A120070 read downwards antidiagonals. 1
3, 8, 5, 15, 12, 24, 7, 21, 35, 16, 32, 48, 9, 27, 45, 63, 20, 40, 60, 80, 11, 33, 55, 77, 99, 24, 48, 72, 96, 120, 13, 39, 65, 91, 117, 143, 28, 56, 84, 112, 140, 168, 15, 45, 75, 105, 135, 165, 195, 32, 64, 96, 128, 160, 192, 224 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The triangle in this rearrangement contains 1, 1, 2, 2, 3, 3, 4, 4,... = floor((n+1)/2) entries in row n.
The first differences between terms in row n are A005843(n+2).
LINKS
EXAMPLE
3;
8;
5,15;
12,24;
7,21,35;
16,32,48;
CROSSREFS
Sequence in context: A120072 A166492 A120070 * A121164 A086872 A363421
KEYWORD
nonn,easy,tabf
AUTHOR
Paul Curtz, Aug 31 2008
STATUS
approved

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Last modified March 1 20:05 EST 2024. Contains 370443 sequences. (Running on oeis4.)