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A249867 Number of days between prime dates in a non-leap year; starting with Feb 2 and ending with Feb 2 in the following year. 2
1, 2, 2, 4, 2, 4, 2, 4, 7, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 32, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 32, 1, 2, 2, 4, 2, 4, 2, 4, 6, 2, 94, 1, 2, 2, 4, 2, 4, 2, 4, 6, 65 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A prime date means that the number of the day of the month and the number for the month are both prime.

The 52 prime dates in a non-leap year are:

Feb 2, 3, 5, 7, 11, 13, 17, 19, 23,

Mar 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31,

May 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31,

Jul 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31,

Nov 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.

There are 52 entries in this sequence because the 65 days between Nov 29 and Feb 2 in the following year have also been taken into account.

LINKS

Table of n, a(n) for n=1..52.

CROSSREFS

Cf. A249868.

Sequence in context: A075526 A001223 A118776 * A092520 A147848 A239614

Adjacent sequences:  A249864 A249865 A249866 * A249868 A249869 A249870

KEYWORD

nonn,fini,full

AUTHOR

Wolfdieter Lang, Nov 23 2014

STATUS

approved

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Last modified January 18 16:40 EST 2019. Contains 319271 sequences. (Running on oeis4.)