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 A160661 Numbers that have a "t" in the middle of their names. 4
 15, 16, 21, 22, 26, 31, 32, 36, 74, 75, 79, 81, 82, 86, 91, 92, 96, 123, 127, 128, 133, 137, 138, 223, 227, 228, 233, 237, 238, 623, 627, 628, 633, 637, 638, 1300, 1813, 1814, 1818, 1819, 1841, 1842, 1846, 1851, 1852, 1856, 1861, 1862, 1866, 2300, 2813, 2814 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..52. EXAMPLE In the spelling of the name of each term, with spaces and hyphens omitted, each name has an odd number of letters, and the middle letter is "t"; e.g., 15 = fifTeen 16 = sixTeen 21 = twenTyone 22 = twenTytwo 31 = thirTysix 74 = sevenTyfour 81 = eighTyone 91 = nineTytwo 123 = onehundredTwentythree 1300 = onethousandThreehundred 1813 = onethousandeighThundredthirteen MATHEMATICA ok[n_] := Block[{s = StringReplace[ IntegerName[n, "Words"], ", " | " " | "\[Hyphen]" -> ""], k}, k = StringLength[s]; OddQ[k] && StringTake[s, {(k + 1)/2}] == "t"]; Select[Range[3000], ok] (* Giovanni Resta, Jul 30 2019 *) CROSSREFS Sequence in context: A039689 A332515 A063530 * A342941 A046417 A193566 Adjacent sequences: A160658 A160659 A160660 * A160662 A160663 A160664 KEYWORD nonn,word AUTHOR Claudio Meller, May 22 2009 EXTENSIONS Corrected, edited, and extended by Jon E. Schoenfield, Jul 29 2019 STATUS approved

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Last modified December 2 03:54 EST 2023. Contains 367505 sequences. (Running on oeis4.)