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 A167843 Obtuse-angled primes. 5
 113, 127, 137, 139, 149, 157, 167, 179, 199, 211, 223, 227, 229, 233, 239, 257, 269, 277, 311, 331, 337, 347, 349, 359, 367, 379, 389, 421, 431, 433, 443, 449, 457, 467, 479, 499, 521, 541, 557, 569, 577, 599, 631, 641, 643, 653, 661, 677, 733, 743, 751, 761 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes in A135603. Primes whose structure of digits represents an obtuse angle. The vertex is an internal digit. In the graphic representation the points are connected by imaginary line segments from left to right. LINKS Michael S. Branicky, Table of n, a(n) for n = 1..914 PROG (Python) # uses agen() from A135603 from sympy import isprime g = filter(isprime, agen()) print([next(g) for n in range(1, 53)]) # Michael S. Branicky, Aug 03 2022 CROSSREFS Cf. A134811, A134951, A134971, A135603, A167841, A167842, A167844, A167845, A167846, A167853. Sequence in context: A345072 A214503 A054033 * A159466 A284598 A060591 Adjacent sequences: A167840 A167841 A167842 * A167844 A167845 A167846 KEYWORD base,nonn AUTHOR Omar E. Pol, Nov 13 2009 EXTENSIONS a(12) and beyond from Michael S. Branicky, Aug 03 2022 STATUS approved

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Last modified February 8 01:34 EST 2023. Contains 360133 sequences. (Running on oeis4.)