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A141287 Years in which there are five Fridays in the month of February. 21
1760, 1788, 1828, 1856, 1884, 1924, 1952, 1980, 2008, 2036, 2064, 2092, 2104, 2132, 2160, 2188, 2228, 2256, 2284, 2324, 2352, 2380, 2408, 2436, 2464, 2492, 2504, 2532, 2560, 2588, 2628, 2656, 2684, 2724, 2752, 2780, 2808, 2836, 2864, 2892, 2904, 2932 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

Index entries for sequences related to calendars

MAPLE

A141287 := proc(n) nper := (n-1) mod 14 ; floor((n-1)/14)*400+op(1+nper , [1760, 1788, 1828, 1856, 1884, 1924, 1952, 1980, 2008, 2036, 2064, 2092, 2104, 2132]) ; end proc: seq(A141287(n), n=1..80) ; # R. J. Mathar, Jan 25 2010

MATHEMATICA

(* First do *) Needs["Calendar`"] (* then *) fQ[y_] := Mod[y, 4] == 0 && Mod[y, 400]!=0 && DayOfWeek[{y, 2, 1}] == Friday; Select[Range[1750, 3051], fQ@# &] (* Robert G. Wilson v, Jun 11 2010 *)

CROSSREFS

Cf. A119406 (Sundays), A135795 (Mondays), A141039 (Wednesdays).

Cf. A143994, A143995.

Sequence in context: A186012 A031802 A020419 * A238050 A213804 A252309

Adjacent sequences:  A141284 A141285 A141286 * A141288 A141289 A141290

KEYWORD

nonn

AUTHOR

J. Lowell, Aug 01 2008

EXTENSIONS

More terms using the 400-year periodicity of the Gregorian calendar by R. J. Mathar, Jan 25 2010

STATUS

approved

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Last modified June 25 19:53 EDT 2017. Contains 288729 sequences.