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A189917 Pattern of the 97 consecutive leap years in a 400 year cycle of the Gregorian calendar. 1
0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248, 252, 256, 260, 264, 268, 272, 276, 280, 284, 288, 292, 296, 304, 308, 312, 316, 320, 324, 328, 332, 336, 340, 344, 348, 352, 356, 360, 364, 368, 372, 376, 380, 384, 388, 392, 396 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

For each year y divisible exactly by 400 the consecutive 97 leap years, in the 400 year cycle of the Gregorian calendar, are y+a(n), n=1,2,...,97.

A 4000 rule (declaring the years 4000,8000,... non-leap years) is not used here.

For the leap year rule for the Gregorian calendar see, e.g., Wikipedia.

LINKS

Table of n, a(n) for n=1..97.

Index entries for sequences related to calendars

FORMULA

Eliminate in the list 4*k, k=0,..99, the numbers 100, 200 and 300.

EXAMPLE

1600 + a(n), n=1,...,97 are leap years,

2000 + a(n), n=1,...,97 are leap years, etc.

CROSSREFS

Cf. A131921.

Sequence in context: A008586 A059558 A008574 * A172326 A311125 A311126

Adjacent sequences:  A189914 A189915 A189916 * A189918 A189919 A189920

KEYWORD

nonn,easy,fini,full

AUTHOR

Wolfdieter Lang, May 02 2011

STATUS

approved

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Last modified November 12 09:29 EST 2019. Contains 329054 sequences. (Running on oeis4.)