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%I #7 Mar 30 2012 17:40:10
%S 0,0,1,0,0,1,3,0,0,1,2,3,5,0,0,0,1,2,3,4,5,7,9,0,0,0,1,1,2,3,4,6,7,9,
%T 11,0,0,0,0,1,2,2,3,4,5,7,8,9,11,13,15,0,0,0,0,1,1,2,3,4,5,6,7,8,10,
%U 11,13,15,17,0,0,0,0,1,1,2,2,3,4,5,6,7,8,9,11,12,14,15,17,19,21
%N Irregular triangle read by rows: floor(j^2 / p) for p prime and j = 1 to p-1.
%C The irregular triangle of numbers is:
%C ....j..1..2..3..4..5..6..7..8..9.10.11.12.13.14.15.16.17.18.19.20.21.22
%C ..p
%C ..2....0
%C ..3....0..1
%C ..5....0..0..1..3
%C ..7....0..0..1..2..3..5
%C .11....0..0..0..1..2..3..4..5..7..9
%C .13....0..0..0..1..1..2..3..4..6..7..9.11
%C .17....0..0..0..0..1..2..2..3..4..5..7..8..9.11.13.15
%C .19....0..0..0..0..1..1..2..3..4..5..6..7..8.10.11.13.15.17
%C .23....0..0..0..0..1..1..2..2..3..4..5..6..7..8..9.11.12.14.15.17.19.21
%H C. H. Gribble, <a href="/A165974/b165974.txt">Flattened irregular triangle read by rows of primes < 300</a>
%Y Cf. A165993 (row sums).
%K nonn,tabf
%O 1,7
%A _Christopher Hunt Gribble_, Oct 02 2009
%E Keyword:tabf added by _R. J. Mathar_, Oct 09 2009
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