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 A123267 T is the first, sixth, fourteenth, etc. character in this sentence. (In this version, letters, spaces, commas and hyphens all count.) 1
 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 (list; graph; refs; listen; history; text; internal format)
 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

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Last modified December 6 14:43 EST 2022. Contains 358644 sequences. (Running on oeis4.)