OFFSET
2,3
REFERENCES
D. G. Kendall et al., Shape and Shape Theory, Wiley, 1999; see p. 6.
FORMULA
The k-th column is an arithmetic progression with difference k.
EXAMPLE
Triangle begins:
0
1 2
2 4 5
3 6 8 9
4 8 11 13 14
5 10 14 17 19 20
6 12 17 21 24 26 27
7 14 20 25 29 32 34 35
8 16 23 29 34 38 41 43 44
9 18 26 33 39 44 48 51 53 54
10 20 29 37 44 50 55 59 62 64 65
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Aug 24 2009
STATUS
approved