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A031139 Number of letters in English words for months of year. 9
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

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

EXAMPLE

a(1) = 7 because January has 7 letters.

MATHEMATICA

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 *)

PROG

(PARI) A031139(n)=digits(879644355878)[12-n%12] \\ M. F. Hasler, Mar 05 2018

CROSSREFS

Cf. A089746.

Sequence in context: A076419 A217516 A071420 * A215733 A226750 A021564

Adjacent sequences:  A031136 A031137 A031138 * A031140 A031141 A031142

KEYWORD

nonn,word

AUTHOR

Dmitri Papichev (Dmitri.Papichev(AT)iname.com)

STATUS

approved

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Last modified May 23 19:07 EDT 2019. Contains 323528 sequences. (Running on oeis4.)