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A213184 Numbers which may represent a date in "condensed American notation" MMDDYY. 3

%I #19 Feb 12 2015 04:04:40

%S 10100,10101,10102,10103,10104,10105,10106,10107,10108,10109,10110,

%T 10111,10112,10113,10114,10115,10116,10117,10118,10119,10120,10121,

%U 10122,10123,10124,10125,10126,10127,10128,10129,10130,10131,10132,10133,10134,10135,10136,10137,10138,10139,10140

%N Numbers which may represent a date in "condensed American notation" MMDDYY.

%C The "may" in the definition should clarify that, e.g., 22900 is in the sequence since it may represent a date (Feb. 29), but not necessarily in any century (e.g., in 2000 but not in 1900), but 22900+k is present only for k=0 (mod 4).

%C The sequence is finite, with 366*25 + 365*75 terms, cf. comment from G. Resta in A213182. The largest term is a(36525)=123199.

%e a(1)=10100 represents, e.g., Jan 01 1900 (or Jan 01 2000).

%e a(100)=10199 (for Jan 01 1999) is followed by a(101)=10200 (for Jan 02 2000).

%e a(3100)=13199 (for Jan 31 1999) is followed by a(3101)=20100 (for Feb 01 2000).

%Y Cf. A213182, A106605, A107273, A107275; A210883, A210884, A210885.

%K nonn,base,fini

%O 1,1

%A _M. F. Hasler_, Feb 28 2013

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)