

A006048


Number of entries in first n rows of Pascal's triangle not divisible by 3.
(Formerly M2519)


2



1, 3, 6, 8, 12, 18, 21, 27, 36, 38, 42, 48, 52, 60, 72, 78, 90, 108, 111, 117, 126, 132, 144, 162, 171, 189, 216, 218, 222, 228, 232, 240, 252, 258, 270, 288, 292, 300, 312, 320, 336, 360, 372, 396
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OFFSET

0,2


REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).


LINKS

Table of n, a(n) for n=0..43.
J.P. Allouche and J. Shallit, The ring of kregular sequences, Theoretical Computer Sci., 98 (1992), 163197.
Akhlesh Lakhtakia and Russell Messier, Selfsimilar sequences and chaos from Gauss sums, Computers & graphics 13.1 (1989): 5962.
A. Lakhtakia & R. Messier, Selfsimilar sequences and chaos from Gauss sums, Computers & Graphics 13.1 (1989), 5962. (Annotated scanned copy)
Akhlesh Lakhtakia and Russell Messier, Selfsimilar sequences and chaos from Gauss sums, Computers & Graphics 13.1 (1989), 5960. (Annotated scanned copy)
A. Lakhtakia et al., Fractal sequences derived from the selfsimilar extensions of the Sierpinski gasket, J. Phys. A 21 (1988), 19251928.


CROSSREFS

Partial sums of A006047.
Sequence in context: A301283 A288218 A212984 * A049827 A186736 A072107
Adjacent sequences: A006045 A006046 A006047 * A006049 A006050 A006051


KEYWORD

nonn


AUTHOR

Jeffrey Shallit


STATUS

approved



