A123267 T is the first, sixth, fourteenth, etc. character in this sentence. (In this version, letters, spaces, commas and hyphens all count.)

1, 6, 14, 20, 28, 32, 36, 40, 43, 47, 51, 58, 62, 66, 77, 81, 87, 94, 97, 104, 107, 117, 125, 132, 139, 145, 152, 159, 173, 179, 188, 196, 204, 211, 218, 226, 234, 241, 249, 257, 277, 298, 319, 323, 339, 343, 349, 365, 369, 392, 396, 402, 421, 427, 446, 472

Offset

1,2

Links

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

Example

  0123456789
0  T is the
1 first, six
2 th, fourte
3 enth, twen
4 tieth, twe
5 nty-eighth
6 , thirty-s
7 econd, thi
8 rty-sixth,
9  fortieth,
0  forty-thi
1 rd, forty-

Prog

(Python)
from num2words import num2words
from itertools import islice
def n2w(n): return num2words(n, ordinal=True).replace(" and", "")
def agen(): # generator of terms
    s, idx = "t is the ", 0
    while True:
        idx = 1 + s.index("t", idx)
        yield idx
        s += n2w(idx) + ", "
print(list(islice(agen(), 56))) # Michael S. Branicky, Mar 18 2022

Crossrefs

Cf. A005224.

Sequence in context: A175678 A173870 A101567 * A236928 A064708 A064709

Adjacent sequences: A123264 A123265 A123266 * A123268 A123269 A123270

Keyword

nonn,word

Author

J. Lowell, Oct 09 2006

Extensions

a(7)-a(22) from R. J. Mathar, Nov 10 2006

a(23) and beyond from Michael S. Branicky, Mar 18 2022

Status

approved