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Prime Triangle

$1\quad 2$
$1\quad 2\quad 3$
$1\quad 2\quad 3\quad 4$
$1\quad 4\quad 3\quad 2\quad 5$
$1\quad 4\quad 3\quad 2\quad 5\quad 6$
This triangle has rows beginning with 1 and ending with $n$, with the Sum of each two consecutive entries being a Prime.

See also Pascal's Triangle


Guy, R. K. Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, p. 106, 1994.

Kenney, M. J. ``Student Math Notes.'' NCTM News Bulletin. Nov. 1986.

© 1996-9 Eric W. Weisstein