A102082 Number of times the n-th letter in an infinitely repeating English alphabet appears in the US English name for the number n.

0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 2, 0, 0, 0, 0, 0, 2, 0, 0, 2, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 3, 1, 1, 1

Offset: 0

Author

Jeremy Ballard (gtg056b(AT)prism.gatech.edu), Feb 13 2005

Keywords

• nonn
• word

Examples

			a(5) = 1 since letter 5 = e appears once in "five".
a(20) = 2 since letter 20 = t appears twice in "twenty".
a(34) = 1 since letter 34 = h appears once in "thirty four".
a(105) = 0 since letter 105 = a does not appear in "one hundred five".
a,b,c,... z, a, b, ... .
1,2,3,...26,27,28, ... .
		

Links

• Michael S. Branicky, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A005589, A072959.

Programs

Python

from num2words import num2words
def a(n): return num2words(n).replace(" and", "").count(chr(96+n%26))
print([a(n) for n in range(87)]) # Michael S. Branicky, Jul 15 2022

Extensions

Name clarified, a(0) inserted, and a(34) and beyond from Michael S. Branicky, Jul 15 2022