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A107276 Vertically symmetrical dates DDMMYY ("condensed European notation") considered as numbers, in increasing order. 1
101101, 111111, 121151, 151121, 181181, 201105, 211115, 221155, 251125, 281185 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

2 and 5 are taken as mirror images (as on calculator displays). From now on, the next symmetric date is November 20 2005 (201105). a(1)=101101, a(2)=111111 and a(5)=181181 share the property to present also two symmetrical halves. Next one is November 11 2011 (11 11 11).

Next one is Nov 21 2015 (211115). - M. F. Hasler, Feb 27 2013

LINKS

Table of n, a(n) for n=1..10.

PROG

(PARI) A107276(n)=101101+[8008, 0, 1001, 2005, 5002][n%5+1]*10+n\6*100004 \\ M. F. Hasler, Feb 28 2013

CROSSREFS

Cf. A053701, A106605.

Sequence in context: A122246 A210895 A107274 * A068445 A210888 A115828

Adjacent sequences:  A107273 A107274 A107275 * A107277 A107278 A107279

KEYWORD

base,easy,fini,full,nonn

AUTHOR

Alexandre Wajnberg, May 19 2005

EXTENSIONS

Edited by Jon E. Schoenfield, Feb 10 2015

STATUS

approved

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Last modified November 12 04:21 EST 2019. Contains 329051 sequences. (Running on oeis4.)