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A231075 Primes with a prime number of letters (A005589) in their (American) English name. 3
2, 3, 7, 23, 37, 79, 83, 97, 101, 131, 149, 181, 191, 269, 281, 307, 337, 379, 383, 397, 419, 461, 541, 577, 601, 617, 631, 659, 691, 727, 733, 787, 797, 823, 827, 883, 887, 911, 919, 941, 977, 1013, 1019, 1051, 1061, 1129, 1151, 1153, 1163, 1171 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Spaces and hyphens don't count, as in A005589. See A163648 and A231073 for the analogs counting syllables resp. words.
Sequence A072686 is the British English analog, which in particular uses the additional "and": It features "one hundred and nine", but not "one hundred and one". In the present sequence, we do have "one hundred one" but not "one hundred nine".
LINKS
PROG
(PARI) is(p)=isprime(A005589(p))&&isprime(p)
(PARI) forprime(p=1, 1200, isprime(A005589(p))&&print1(p", "))
CROSSREFS
Sequence in context: A061712 A059661 A214704 * A072686 A002230 A106865
KEYWORD
nonn,word
AUTHOR
M. F. Hasler, Nov 03 2013
STATUS
approved

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Last modified June 22 06:19 EDT 2024. Contains 373565 sequences. (Running on oeis4.)