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A165974 Irregular triangle read by rows: floor(j^2 / p) for p prime and j = 1 to p-1.

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