A090044 - OEIS

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A090044

Triangle read by rows: T(n,k) = A083093 with 1's and 2's interchanged.

1

2, 2, 2, 2, 1, 2, 2, 0, 0, 2, 2, 2, 0, 2, 2, 2, 1, 2, 2, 1, 2, 2, 0, 0, 1, 0, 0, 2, 2, 2, 0, 1, 1, 0, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 1, 2, 0, 0, 0, 0, 0, 0, 2, 1, 2, 2, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 2, 2, 2, 0, 2, 2, 0, 0, 0, 0, 2, 2, 0, 2, 2

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

0,1

LINKS

Table of n, a(n) for n=0..104.

Y. Moshe, The density of 0's in recurrence double sequences, J. Number Theory, 103 (2003), 109-121; see Fig. 1.

Y. Moshe, The distribution of elements in automatic double sequences, Discr. Math., 297 (2005), 91-103.

FORMULA

The negative of Pascal's triangle read mod 3.

EXAMPLE

2; 2,2; 2,1,2; 2,0,0,2; ...

MATHEMATICA

-Mod[ Flatten[ Table[ Binomial[n, k], {n, 0, 13}, {k, 0, n}]], -3] (* Robert G. Wilson v, Jan 19 2004 *)

CROSSREFS

Cf. A007318, A083093.

Sequence in context: A175357 A232800 A248380 * A036238 A318723 A225180

Adjacent sequences: A090041 A090042 A090043 * A090045 A090046 A090047

KEYWORD

nonn,tabl,easy

AUTHOR

N. J. A. Sloane, Jan 19 2004

EXTENSIONS

Extended by Robert G. Wilson v, Jan 19 2004

STATUS

approved