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Search: id:A054638
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| A054638 |
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0 if pronounced name of n-th letter of English alphabet begin with a vowel sound, otherwise 1. Different from A074322. |
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+0
2
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| 0, 1, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Three curious properties: (1) 13 0's and 13 1's, (2) Sequence is equivalent to the concatenation of its three non-overlapping, consecutive subsequences of lengths 5, 16 and 5, where each of the three subsequences is palindromic (for example, a(6),...,a(21) = 0,1,0,0,1,1,0,0,0,0,1,1,0,0,1,0). (3) "5, 16, 5" is also palindromic.
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EXAMPLE
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a(8)=0 because the name of "h", the 8th letter of the English alphabet, is pronounced with an initial (long) "a" sound (plus "ch"). Because "a" is a vowel, a(8)=0. a(26)=1 because the name of "z", the 26th letter, is pronounced with an initial "z" sound (whether as z plus long-e sounds (e.g. U.S.A.) or as "zed" (Brit.)) and "z" is a consonant, denoted by 1 here.
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CROSSREFS
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Cf. A048659. A074322 gives another version.
Adjacent sequences: A054635 A054636 A054637 this_sequence A054639 A054640 A054641
Sequence in context: A138712 A029693 A051067 this_sequence A074322 A118249 A095076
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KEYWORD
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fini,full,nonn,word
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AUTHOR
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Rick L. Shepherd (rshepherd2(AT)hotmail.com), Feb 09 2002
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