

A349888


Numbers which, when written in English, contain exactly two instances of the letter E.


2



3, 7, 12, 13, 14, 15, 16, 21, 25, 28, 29, 33, 37, 43, 47, 53, 57, 63, 67, 70, 72, 74, 76, 81, 85, 88, 89, 91, 95, 98, 99, 100, 102, 104, 106, 130, 132, 134, 136, 140, 142, 144, 146, 150, 152, 154, 156, 160, 162, 164, 166, 201, 205, 208, 209, 210, 220, 222, 224, 226, 231, 235, 238, 239
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OFFSET

1,1


LINKS

Michael S. Branicky, Table of n, a(n) for n = 1..10000


EXAMPLE

THREE has two Es (and is thus in the sequence), FOUR has no E, FIVE has only one, SIX has none, SEVEN has two Es (and is thus in the sequence). Etc.


PROG

(Python)
from num2words import num2words
def ok(n): return num2words(n).count("e") == 2
print([k for k in range(311) if ok(k)]) # Michael S. Branicky, Feb 19 2022


CROSSREFS

Cf. A006933 ('Eban' numbers) and A349887 (exactly one instance).
Sequence in context: A351103 A332464 A256563 * A243705 A057927 A298788
Adjacent sequences: A349885 A349886 A349887 * A349889 A349890 A349891


KEYWORD

word,nonn


AUTHOR

Eric Angelini, Dec 04 2021


EXTENSIONS

a(7) = 16 inserted by Michael S. Branicky, Feb 19 2022


STATUS

approved



