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%I M2519 #29 Oct 27 2022 13:25:32
%S 1,3,6,8,12,18,21,27,36,38,42,48,52,60,72,78,90,108,111,117,126,132,
%T 144,162,171,189,216,218,222,228,232,240,252,258,270,288,292,300,312,
%U 320,336,360,372,396
%N Number of entries in first n rows of Pascal's triangle not divisible by 3.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H J.-P. Allouche and J. Shallit, <a href="http://dx.doi.org/10.1016/0304-3975(92)90001-V">The ring of k-regular sequences</a>, Theoretical Computer Sci., 98 (1992), 163-197.
%H Hsien-Kuei Hwang, Svante Janson, and Tsung-Hsi Tsai, <a href="https://arxiv.org/abs/2210.10968">Identities and periodic oscillations of divide-and-conquer recurrences splitting at half</a>, arXiv:2210.10968 [cs.DS], 2022, p. 53.
%H Akhlesh Lakhtakia and Russell Messier, <a href="http://dx.doi.org/10.1016/0097-8493(89)90038-1">Self-similar sequences and chaos from Gauss sums</a>, Computers & graphics 13.1 (1989): 59-62.
%H Akhlesh Lakhtakia and Russell Messier, <a href="/A005821/a005821.pdf">Self-similar sequences and chaos from Gauss sums</a>, Computers & Graphics 13.1 (1989), 59-62. (Annotated scanned copy)
%H Akhlesh Lakhtakia and Russell Messier, <a href="/A006046/a006046.pdf">Self-similar sequences and chaos from Gauss sums</a>, Computers & Graphics 13.1 (1989), 59-60. (Annotated scanned copy)
%H A. Lakhtakia et al., <a href="http://dx.doi.org/10.1088/0305-4470/21/8/030">Fractal sequences derived from the self-similar extensions of the Sierpinski gasket</a>, J. Phys. A 21 (1988), 1925-1928.
%Y Partial sums of A006047.
%K nonn
%O 0,2
%A _Jeffrey Shallit_
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