A125299 Numbers whose names in English start with a consonant.

0, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70

Offset: 1

Author

Tanya Khovanova, Dec 08 2006

Keywords

• nonn
• word

Links

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

Programs

Python

def ok(n):
    s = str(n)
    if s[0] in "02345679": return True
    while len(s) > 3: s = s[:-3]
    return int(s) in {10, 12, 13, 14, 15, 16, 17, 19}
print([k for k in range(71) if ok(k)]) # Michael S. Branicky, Nov 27 2022

Extensions

a(1) = 0 inserted and a(39) and beyond from Michael S. Branicky, Nov 27 2022