Days in year in proleptic Gregorian calendar.

Terms

a(0) =365a(1) =365a(2) =365a(3) =366a(4) =365a(5) =365a(6) =365a(7) =366a(8) =365a(9) =365a(10) =365a(11) =366a(12) =365a(13) =365a(14) =365a(15) =366a(16) =365a(17) =365a(18) =365a(19) =366a(20) =365a(21) =365a(22) =365a(23) =366a(24) =365a(25) =365a(26) =365a(27) =366a(28) =365a(29) =365