A160774 Numbers that have a "y" in the middle of their names in American English.

23, 27, 28, 33, 37, 38, 44, 45, 49, 54, 55, 59, 64, 65, 69, 83, 87, 88, 93, 97, 98, 120015, 120016, 120070, 121004, 121005, 121009, 122004, 122005, 122009, 124001, 124002, 124006, 124010, 125001, 125002, 125006, 125010, 126004, 126005, 126009, 129001, 129002, 129006, 129010

Offset

1,1

Links

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

Example

In the spelling of the name of each term, with spaces and hyphens omitted, each name has an odd number of letters, and the middle letter is "y"; e.g.,
  23 = twentYthree,
  27 = twentYseven,
  28 = twentYeight,
  etc.

Prog

(Python)
from num2words import num2words
def n2w(n): return "".join(c for c in num2words(n).replace(" and", "") if c.isalpha())
def ok(n): return len(w:=n2w(n))&1 and w[len(w)>>1] == "y"
print([k for k in range(13*10**4) if ok(k)]) # Michael S. Branicky, May 20 2026

Crossrefs

Cf. A160658, A160659, A160660, A160661, A160662.

Sequence in context: A025059 A365020 A316724 * A163142 A038772 A188454

Adjacent sequences: A160771 A160772 A160773 * A160775 A160776 A160777

Keyword

nonn,word

Author

Claudio Meller, May 26 2009

Extensions

Name clarified and a(22) onward from Michael S. Branicky, May 20 2026

Status

approved