A163648 Primes p with a prime number of syllables in their name in American English.

7, 11, 13, 17, 19, 23, 29, 31, 41, 43, 53, 59, 61, 83, 89, 107, 113, 127, 137, 157, 167, 173, 179, 197, 227, 257, 271, 307, 313, 337, 347, 367, 373, 379, 397, 419, 457, 467, 479, 487, 547, 557, 571, 587, 607, 613, 619, 647, 673, 701, 709, 733, 739, 743, 751

Offset

1,1

Comments

The word "and" is excluded, 101 is "one hundred one" rather than "one hundred and one."

See A231073 and A231075 for the analogs counting words resp. letters. - M. F. Hasler, Nov 03 2013

Links

Table of n, a(n) for n=1..55.

Index to OEIS: sequences related to English words for n

Formula

{p in A000040 such that A075774(p) is in A000040}.

Example

a(1) = 7, which has a prime number, 2, of syllables sev-en. a(2) = 11, which has a prime number, 3, of syllables e-lev-en.

Prog

(PARI) forprime(p=1, 900, isprime(A075774(p))&&print1(p", ")) \\ - M. F. Hasler, Nov 03 2013
(PARI) is(p)=isprime(A075774(p))&&isprime(p) \\ - M. F. Hasler, Nov 03 2013
(Python) # uses function in A075774
from sympy import isprime
def ok(n): return isprime(A075774(n)) and isprime(n)
print([k for k in range(800) if ok(k)]) # Michael S. Branicky, May 27 2024

Crossrefs

Cf. A000040, A075774, A164043.

Sequence in context: A078873 A020603 A283532 * A135776 A067831 A086998

Adjacent sequences: A163645 A163646 A163647 * A163649 A163650 A163651

Keyword

word,easy,nonn

Author

Jonathan Vos Post, Aug 02 2009

Extensions

Extended and edited by Charles R Greathouse IV, Nov 02 2009

Values double-checked by M. F. Hasler, Nov 03 2013

Status

approved