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Date: 21-10-2019
2537
Date: 30-12-2020
2651
Date: 20-1-2020
1527
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The trinomial triangle is a number triangle of trinomial coefficients. It can be obtained by starting with a row containing a single "1" and the next row containing three 1s and then letting subsequent row elements be computed by summing the elements above to the left, directly above, and above to the right:
(OEIS A027907).
The plot above shows the binary representations for the first 255 (top figure) and 511 (bottom figure) terms of a flattened trinomial triangle.
REFERENCES:
Sloane, N. J. A. Sequence A027907 in "The On-Line Encyclopedia of Integer Sequences."
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