1,1

Primes in A135602.

Primes whose structure of digits represent a right 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..14.

Cf. A135602, A048398.

Sequence in context: A227521 A171813 A089291 * A244369 A200733 A267002

Adjacent sequences: A167839 A167840 A167841 * A167843 A167844 A167845

base,nonn,fini,full,less

Omar E. Pol, Nov 13 2009

More terms from Jens Kruse Andersen, Jun 26 2014

approved