A167841 Acute-angled primes.

103, 107, 109, 131, 151, 163, 173, 181, 191, 193, 197, 241, 251, 263, 271, 281, 283, 293, 307, 313, 317, 353, 373, 383, 397, 401, 409, 419, 439, 461, 463, 487, 491, 503, 509, 523, 547, 563, 571, 587, 593, 601, 607, 613, 617, 619, 647, 659, 673, 683, 691, 701, 709, 719, 727

Offset

1,1

Comments

Primes whose structure of digits represents 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.

Links

Micah Manary, Table of n, a(n) for n = 1..204

Micah Manary, Python program

Crossrefs

Primes in A135601.

Sequence in context: A212542 A074675 A235155 * A213311 A161402 A318295

Adjacent sequences: A167838 A167839 A167840 * A167842 A167843 A167844

Keyword

base,nonn,fini,full,less

Author

Omar E. Pol, Nov 13 2009

Extensions

More terms from Micah Manary, Aug 02 2022

Status

approved