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A277972
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a(1) = 1. a(n) is the smallest unlisted number, the name of which contains the first letter of the name of a(n-1) in English.
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7
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1, 2, 3, 8, 5, 4, 14, 15, 24, 10, 12, 13, 16, 6, 7, 17, 26, 18, 9, 11, 19, 20, 21, 22, 23, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 64, 60, 61, 62, 63, 65, 66, 67, 68, 69
(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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MATHEMATICA
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name[n_]:=IntegerName[n, "Words"]; a[1]=1;
a[n_]:=a[n]=Module[{i=1}, While[Or[MemberQ[Table[a[k], {k, 1, n-1}], i],
!StringContainsQ[name[i], StringTake[name[a[n-1]], 1]]], i++ ]; i];
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CROSSREFS
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KEYWORD
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easy,nonn,word
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AUTHOR
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STATUS
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approved
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