A143995 Years in which there are five Thursdays in the month of February, in the Gregorian calendar.

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

Offset

1,1

Links

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

Index entries for sequences related to calendars

Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1).

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 (Sun), A135795 (Mon), A143994 (Tue), A141039 (Wed), A141287 (Fri), A176478 (Sat).

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