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 A291663 Numbers beginning with a vowel in Danish. 3
 1, 8, 11, 18, 21, 28, 31, 38, 41, 48, 51, 58, 61, 68, 71, 78, 81, 88, 91, 98, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The sequence of words is: en, otte, elleve, atten, enogtyve, otteogtyve, enogtredive, otteogtredive, enogfyrre, otteogfyrre, enoghalvtreds, otteoghalvtreds, enogtreds, otteogtreds, enoghalvfjerds, ... LINKS Halfdan Skjerning, Table of n, a(n) for n = 1..150 Brady Haran and Tom Scott, 58 and other Confusing Numbers, Numberphile video (2015) Wikipedia, List of numbers in various languages FORMULA All numbers beginning with '1' or '8', except for two-digit numbers that do not end in '1' or '8'. MATHEMATICA Select[Range@ 149, With[{d = IntegerDigits@ #}, MemberQ[{1, 8}, If[Length@ d == 2, First@ Reverse@ d, First@ d]]] &] (* Michael De Vlieger, Aug 30 2017 *) CROSSREFS Cf. A000861, A079741, A098060, A247751, A291621. Sequence in context: A127271 A118549 A299979 * A306277 A067469 A237767 Adjacent sequences:  A291660 A291661 A291662 * A291664 A291665 A291666 KEYWORD nonn,easy,word AUTHOR Halfdan Skjerning, Aug 29 2017 STATUS approved

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Last modified January 25 17:14 EST 2020. Contains 331245 sequences. (Running on oeis4.)