A210890 -id:A210890 - cp's OEIS frontend

A210889 Number of days after Mar 01 00 such that the date written in the format D.M.YY (and considered as a number without the dots) is palindromic.

315, 346, 374, 405, 435, 466, 496, 527, 558, 619, 690, 721, 749, 780, 810, 841, 871, 902, 933, 994, 1065, 1124, 1155, 1185, 1216, 1246, 1277, 1308, 1369, 3958, 3968, 3999, 4027, 4058, 4088, 4119, 4149, 4180, 4211, 4231, 4262, 4272, 4292, 4324, 4343, 4374, 4403, 4434, 4464, 4495, 4525, 4556, 4587, 4598, 4629, 4648, 4659, 4691, 4719, 4778, 4839, 4900

Offset: 1

Hieronymus Fischer, Apr 01 2012

There are exactly 322 such palindromic dates between Mar 1 00 and Dec 31 99 (see b-file for the complete list).
See A210890 for the corresponding dates.
The definition is different from A210891 in that the dates are considered as numbers.
The reference date Mar 1 00 makes sense, since this definition results in a sequence which is independent from the leap year / non-leap year property of the reference year '00'.

			The first palindromic date in D.M.YY format after 'Jan 01 00' is A210890(1)=10101 (= '10.1.01' = 'Jan 10 01' = 'Mar 01 00' + 315 days);
The 10th palindromic date in D.M.YY format after 'Jan 01 00' is A210890(10)=101101 (= '10.11.01' = 'Nov 10 01' = 'Mar 01 00' + 619 days);
The 44th palindromic date in D.M.YY format after 'Jan 01 00' is A210890(44)=2112 (= '2.1.12' = 'Jan 2 12' = 'Mar 01 00' + 4324 days);
The last (322nd) palindromic date in D.M.YY format after 'Jan 01 00' is A210890(322)=9999 (= '9.9.99' = 'Sep 09 99' = 'Mar 01 00' + 36351 days).

Hieronymus Fischer, Table of n, a(n) for n = 1..322

Cf. A210883-A210888, A210890-A210895, A106605, A107273, A107275.

A210891 Number of days after Mar 01 00 such that the date written in the format D.M.YY is palindromic.

Original entry on oeis.org

315, 346, 374, 405, 435, 466, 496, 527, 558, 619, 690, 721, 749, 780, 810, 841, 871, 902, 933, 994, 1065, 1124, 1155, 1185, 1216, 1246, 1277, 1308, 1369, 3968, 3999, 4027, 4058, 4088, 4119, 4149, 4180, 4211, 4272, 4343, 4374, 4403, 4434, 4464

Offset: 1

Hieronymus Fischer, Apr 01 2012

There are exactly 214 such palindromic dates between Jan 1 00 and Dec 31 99 (see b-file for the complete list).
The definition is different from A210889/A210890 in that the palindrome property is evaluated including the dots.
See A210892 for the corresponding dates.
The reference date Mar 1 00 makes sense, since this definition results in a sequence which is independent from the leap year / non-leap year property of the reference year '00'.

			The first palindromic date in D.M.YY format after 'Jan 01 00' is A210892(1)=10101 (='10.1.01'= 'Jan 10 01' = 'Mar 01 00' + 315 days);
The 10th palindromic date in D.M.YY format after 'Jan  01 00' is A210892(10)=101101 (='10.11.01'= 'Nov 10 01' = 'Mar 01 00' + 619 days);
The 44th palindromic date in D.M.YY format after 'Mar 01 00' is A210892(44)=21512 (='21.5.12'= 'May 21 12' = 'Mar 01 00' + 4464 days);
The last (214th) palindromic date in D.M.YY format after 'Mar 01 00' is A210892(214)=291192 (='29.11.92'= 'Nov 29 92' = 'Mar 01 00' + 33876 days).

Hieronymus Fischer, Table of n, a(n) for n = 1..214

Cf. A210883 - A210890, A210892 - A210895, A106605, A107273, A107275

A210892 Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format D.M.YY. The terms are listed as numbers. Leading zeros of the terms are suppressed.

Original entry on oeis.org

10101, 10201, 10301, 10401, 10501, 10601, 10701, 10801, 10901, 101101, 20102, 20202, 20302, 20402, 20502, 20602, 20702, 20802, 20902, 201102, 30103, 30303, 30403, 30503, 30603, 30703, 30803, 30903, 301103, 11111, 11211, 11311, 11411, 11511, 11611, 11711

Offset: 1

Hieronymus Fischer, Apr 01 2012

There are exactly 214 such palindromic dates between Jan 1 00 and Dec 31 99 (see b-file for the complete list).
See A210891 for the number of days after 'Mar 1 00' to get such a palindromic date.
The definition is different from A210889/A210890 in that the palindrome property is evaluated including the dots.
To get a real date from a term, insert a dot between the second and the third digit from the left and between the second and the third digit from the right.

			The first palindromic date in D.M.YY format after 'Jan 01 00' is a(1)=10101 (='10.1.01'= 'Jan, 10 01' = 'Mar 01 00' + A210891(1) days);
The 10th palindromic date in D.M.YY format after 'Jan  01 00' is a(10)=101101 (='10.11.01'= 'Nov 10 01' = 'Mar 01 00' + A210891(10) days);
The 44th palindromic date in D.M.YY format after 'Jan  01 00' is a(44)=21512 (='21.5.12'= 'May 21 12' = 'Mar 01 00' + A210891(44) days);
The last (214th) palindromic date in D.M.YY format after 'Jan 01 00' is a(214)=291192 (='29.11.92'= 'Nov 29 92' = 'Mar 01 00' + A210891(214) days).

Hieronymus Fischer, Table of n, a(n) for n = 1..214

Cf. A210883 - A210891, A210893 - A210895, A106605, A107273, A107275

a(n)=DMYY_date('Mar 1 00' + A210891(n)).

cp's OEIS Frontend

A210889 Number of days after Mar 01 00 such that the date written in the format D.M.YY (and considered as a number without the dots) is palindromic.

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A210891 Number of days after Mar 01 00 such that the date written in the format D.M.YY is palindromic.

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Author

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Comments

Examples

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A210892 Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format D.M.YY. The terms are listed as numbers. Leading zeros of the terms are suppressed.

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