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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. 4
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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'.

LINKS

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

EXAMPLE

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).

CROSSREFS

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

Sequence in context: A283901 A207148 A210889 * A076648 A323380 A256575

Adjacent sequences:  A210888 A210889 A210890 * A210892 A210893 A210894

KEYWORD

nonn,base

AUTHOR

Hieronymus Fischer, Apr 01 2012

STATUS

approved

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Last modified November 14 12:38 EST 2019. Contains 329114 sequences. (Running on oeis4.)