A339753 Base-ten n whose English number-word expression contains a letter making its n-th appearance in the list of consecutive positive integer number-words.

1, 2, 3, 11, 23, 24, 29, 31, 108, 109, 198, 199, 240, 241, 243, 244, 245, 246, 247, 248, 249, 250, 251, 453, 454, 559, 1174, 1716, 5556, 5557, 6956, 6957, 15756, 17155, 24998, 24999, 43568, 43569, 735759, 1105805, 1105806, 1105807, 1107784, 1107785, 1584503, 1584504

Offset

1,2

Comments

Conjecture: a(494) = 1001001001001998 (for the letter 'a').

Links

Hans Havermann, Table of n, a(n) for n = 1..493

Hans Havermann, On target (revisited)

Example

In the list of English consecutive positive integers (one, two, three, ...)
the first 'o', the first 'n', and the first 'e' are in 'one',
the 2nd 'o' is the only such in 'two',
the 3rd 'e' is the second of two such in 'three',
the 11th 'e' is the second of three such in 'eleven',
the 23rd 't' is the third of three such in 'twenty-three',
the 24th 't' is the first of two such in 'twenty-four',
the 29th 'n' is the second of three such in 'twenty-nine',
the 31st 'n' is the only such in 'thirty-one',
the 108th 'n' is the second of two such in 'one hundred eight', ...

Crossrefs

Cf. A339752 (digits variant).

Sequence in context: A057135 A229805 A104075 * A236168 A235634 A070174

Adjacent sequences: A339750 A339751 A339752 * A339754 A339755 A339756

Keyword

nonn,base,word,fini

Author

Claudio Meller and Hans Havermann, Dec 15 2020

Status

approved