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A167845
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Concave primes.
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7
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131, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 233, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 331, 353, 367, 373, 379, 383, 389, 397, 431, 443, 461, 463, 467, 479, 487, 491, 499, 541, 563, 571, 577, 587, 593, 599, 641, 653, 661, 673
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Primes in A135642.
Primes whose structure of digits represent a concave function or a concave object. In the graphic representation the points are connected by imaginary line segments (or line curves) from left to right.
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CROSSREFS
| Cf. A134811, A134951, A134971, A135642, A167841, A167842, A167843, A167844, A167846, A167853.
Sequence in context: A159256 A039558 A045164 * A134951 A173071 A164294
Adjacent sequences: A167842 A167843 A167844 * A167846 A167847 A167848
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KEYWORD
| base,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Nov 13 2009
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EXTENSIONS
| More terms from Max Alekseyev (maxale(AT)gmail.com), Apr 24 2010
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