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 A143995 Years in which there are five Thursdays in the month of February, in the Gregorian calendar. 6
 1776, 1816, 1844, 1872, 1912, 1940, 1968, 1996, 2024, 2052, 2080, 2120, 2148, 2176, 2216, 2244, 2272, 2312, 2340, 2368, 2396, 2424, 2452, 2480, 2520, 2548, 2576, 2616, 2644, 2672, 2712, 2740, 2768, 2796, 2824, 2852, 2880, 2920, 2948, 2976, 3016, 3044 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MAPLE A143995 := proc(n) nper := (n-1) mod 13 ; floor((n-1)/13)*400+op(1+nper , [1776, 1816, 1844, 1872, 1912, 1940, 1968, 1996, 2024, 2052, 2080, 2120, 2148] ) ; end proc: seq(A143995(n), n=1..80) ; # R. J. Mathar, Mar 29 2010 MATHEMATICA (* Needs Mma version >= 9.0 *) okQ[y_] := LeapYearQ[{y}] && DayName[{y, 2, 1}] == Thursday; Select[Range[1752, 3051, 4], okQ] (* Jean-François Alcover, Mar 27 2020 *) CROSSREFS Cf. A119406, A135795, A143994, A141039, A141287. Sequence in context: A187132 A185836 A047826 * A205938 A238307 A233953 Adjacent sequences:  A143992 A143993 A143994 * A143996 A143997 A143998 KEYWORD nonn AUTHOR J. Lowell, Sep 07 2008 EXTENSIONS More terms from R. J. Mathar, Mar 29 2010 STATUS approved

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Last modified October 22 05:01 EDT 2020. Contains 337950 sequences. (Running on oeis4.)