A210891 Number of days after Mar 01 00 such that the date written in the format D.M.YY 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, 3968, 3999, 4027, 4058, 4088, 4119, 4149, 4180, 4211, 4272, 4343, 4374, 4403, 4434, 4464

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: A207148 A361034 A210889 * A076648 A323380 A256575

Adjacent sequences: A210888 A210889 A210890 * A210892 A210893 A210894

Keyword

nonn,base

Author

Hieronymus Fischer, Apr 01 2012

Status

approved