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A155476
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Primes n with identical largest digits of n and n-th prime.
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0
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7, 29, 37, 73, 97, 109, 137, 139, 149, 181, 239, 271, 281, 283, 293, 307, 367, 379, 397, 419, 449, 499, 557, 577, 593, 599, 631, 659, 691, 733, 751, 839, 877, 881, 883, 911, 919, 971, 977, 1109, 1129, 1193, 1229, 1249, 1283, 1289, 1291, 1307, 1429, 1489
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| If n=7=prime and 17=prime(7), then 7=7>1 and 7=a(1). If n=29=prime and 109=prime(29), then 2<9=9>1>0 and 29=a(2). If n=37=prime and 157=prime(37), then 3<7=7>5>1 and 37=a(3), etc.
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MAPLE
| Contribution from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 10 2010: (Start)
A054055 := proc(n) max( op(convert(n, base, 10)) ) ; end proc:
for n from 2 to 2200 do if isprime(n) then if A054055(n) = A054055(ithprime(n)) then printf("%d, ", n) ; end if; end if; end do: (End)
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CROSSREFS
| Cf. A000027, A000040.
Sequence in context: A107923 A096450 A156124 * A166970 A075583 A103603
Adjacent sequences: A155473 A155474 A155475 * A155477 A155478 A155479
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KEYWORD
| nonn,base
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 23 2009
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EXTENSIONS
| Corrected most terms > 300 - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 10 2010
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