A257043 Integers with the same first and last letter in their English name.

19, 28, 38, 81, 83, 85, 89, 97, 102, 122, 132, 142, 152, 162, 172, 182, 192, 208, 228, 238, 248, 258, 268, 278, 288, 298, 308, 328, 338, 348, 358, 368, 378, 388, 398, 801, 803, 805, 809, 812, 821, 823, 825, 829, 831, 833, 835, 839, 841, 843, 845, 849, 851, 853, 855, 859

Offset

1,1

Comments

Used in a Weekend Edition Sunday Puzzle, Jul 19 2015. Puzzle idea from Rodolfo Kurchan.

Earlier, used in Only Connect in 2010 (series 3 episode 10). - Michael Hamm, Oct 28 2023

Links

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

Weekend Edition Sunday Puzzle, Sunday, Jul 26 2015.

Example

19 starts and ends with 'n'. 28 and 38 have 't', 97 has 'n'.

Prog

(Python)
from num2words import num2words
def ok(n): s = num2words(n); return s[0] == s[-1]
print([k for k in range(860) if ok(k)]) # Michael S. Branicky, Apr 12 2022

Crossrefs

Sequence in context: A243994 A083678 A279771 * A369341 A368871 A120144

Adjacent sequences: A257040 A257041 A257042 * A257044 A257045 A257046

Keyword

nonn,easy,word

Author

Chris Hibbert, Jul 20 2015

Status

approved