Primes in A135601.
Primes whose structure of digits represent an acute angle. The vertex is an internal digit. In the graphic representation the points are connected by imaginary line segments from left to right. This sequence is finite.
Table of n, a(n) for n=1..10.
Sequence in context: A212542 A074675 A235155 * A213311 A161402 A165294
Adjacent sequences: A167838 A167839 A167840 * A167842 A167843 A167844
Omar E. Pol, Nov 13 2009