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A049525
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I is the first, second, eighth, ... letter in this sentence not counting spaces or commas.
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5
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1, 2, 8, 19, 25, 41, 51, 56, 61, 66, 71, 76, 81, 86, 91, 103, 115, 120, 126, 131, 137, 142, 148, 164, 178, 201, 222, 238, 243, 259, 307, 323, 351, 367, 405, 410, 432, 446, 451, 494, 510, 515, 532, 555, 588, 615, 631, 636, 652, 664, 680, 691, 700, 712, 723, 734
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..56.
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EXAMPLE
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The sentence begins:
1234567890 1234567890 1234567890 1234567890 1234567890
Iisthefirs tsecondeig hthninetee nthtwentyf ifthfortyf
irstfiftyf irstfiftys ixthsixtyf irstsixtys ixthsevent
yfirstseve ntysixthei ghtyfirste ightysixth ninetyfirs
tonehundre dthirdoneh undredfift eenthonehu ndredtwent
iethonehun dredtwenty sixthonehu ndredthirt yfirstoneh
undredthir tyseventho nehundredf ortysecond onehundred ...
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MATHEMATICA
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seed="iisthe"; s[1]=1; s[2]=2; name[n_]:=
StringReplace[IntegerName[n, {"English", "Ordinal"}], {"-"->"", " "->""}];
s[n_]:=seed=StringJoin[seed<>name[StringPosition[seed, "i"][[n-2, 1]]]];
l=s/@Range[56]; Table[StringPosition[Last[l], "i"][[k, 1]], {k, 1, Length[l]}]
(* Ivan N. Ianakiev, Apr 02 2022 *)
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PROG
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(Python)
from num2words import num2words
from itertools import islice
def n2w(n):
os = num2words(n, ordinal=True).replace(" and", "")
return os.replace(" ", "").replace("-", "").replace(", ", "")
def agen(): # generator of terms
s, idx = "iisthe", 0
while True:
idx_rel = 1 + s.index("i")
idx += idx_rel
yield idx
s = s[idx_rel:] + n2w(idx)
print(list(islice(agen(), 56))) # Michael S. Branicky, Apr 02 2022
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CROSSREFS
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Cf. A005224, A055508.
Sequence in context: A072675 A033711 A093012 * A286263 A236327 A109071
Adjacent sequences: A049522 A049523 A049524 * A049526 A049527 A049528
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KEYWORD
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nonn,word,easy,nice
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AUTHOR
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J. Lowell
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EXTENSIONS
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More terms from Robert G. Wilson v, Jul 18 2000
Corrected and extended by Larry Reeves (larryr(AT)acm.org), Nov 02 2000
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STATUS
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approved
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