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A031139
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Number of letters in English words for months of year.
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9
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7, 8, 5, 5, 3, 4, 4, 6, 9, 7, 8, 8, 7, 8, 5, 5, 3, 4, 4, 6, 9, 7, 8, 8, 7, 8, 5, 5, 3, 4, 4, 6, 9, 7, 8, 8, 7, 8, 5, 5, 3, 4, 4, 6, 9, 7, 8, 8, 7, 8, 5, 5, 3, 4, 4, 6, 9, 7, 8, 8, 7, 8, 5, 5, 3, 4, 4, 6, 9, 7, 8, 8
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Period 12.
According to the definition this should strictly speaking be finite: there is no 13th month of the year. But for several reasons we prefer to see this as an infinite periodic sequence. - M. F. Hasler, Mar 05 2018
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LINKS
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Table of n, a(n) for n=1..72.
Time and Date, A Calendar website
Index entries for sequences related to calendars
Index to 12-periodic sequences
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EXAMPLE
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a(1) = 7 because January has 7 letters.
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MATHEMATICA
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PadRight[{}, 72, {7, 8, 5, 5, 3, 4, 4, 6, 9, 7, 8, 8}] (* or *)
Array[StringLength@ DateString[DateObject[{0, Mod[#, 12] + 1, 1, 0, 0, 0}, "Month"], {"MonthName"}] &, 72, 0] (* Michael De Vlieger, Feb 25 2018 *)
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PROG
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(PARI) A031139(n)=digits(879644355878)[12-n%12] \\ M. F. Hasler, Mar 05 2018
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CROSSREFS
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Cf. A089746.
Sequence in context: A076419 A217516 A071420 * A215733 A226750 A021564
Adjacent sequences: A031136 A031137 A031138 * A031140 A031141 A031142
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KEYWORD
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nonn,word
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AUTHOR
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Dmitri Papichev (Dmitri.Papichev(AT)iname.com)
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STATUS
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approved
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