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 A143994 Years in which there are five Tuesdays in the month of February. 6

%I

%S 1752,1780,1820,1848,1876,1916,1944,1972,2000,2028,2056,2084,2124,

%T 2152,2180,2220,2248,2276,2316,2344,2372,2400,2428,2456,2484,2524,

%U 2552,2580,2620,2648,2676,2716,2744,2772,2800,2828,2856,2884,2924,2952,2980,3020,3048

%N Years in which there are five Tuesdays in the month of February.

%H <a href="/index/Ca#calendar">Index entries for sequences related to calendars</a>

%p A143994 := proc(n) nper := (n-1) mod 13 ; floor((n-1)/13)*400+op(1+nper , [1780, 1820, 1848, 1876, 1916, 1944, 1972, 2000, 2028, 2056, 2084, 2124, 2152] ) ; end proc: seq(A143994(n), n=1..80) ; # _R. J. Mathar_, Mar 29 2010

%t (* Needs Mma version >= 9.0 *)

%t okQ[y_] := LeapYearQ[{y}] && DayName[{y, 2, 1}] == Tuesday;

%t Select[Range[1752, 3051, 4], okQ] (* _Jean-François Alcover_, Mar 27 2020 *)

%Y Cf. A119406, A135795, A141039, A141287, A143995.

%K nonn

%O 1,1

%A _J. Lowell_, Sep 07 2008

%E More terms from _R. J. Mathar_, Mar 29 2010

%E a(1) = 1752 inserted by _Jean-François Alcover_, Mar 27 2020

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Last modified November 26 07:49 EST 2020. Contains 338632 sequences. (Running on oeis4.)