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A105047 Form an addition table of the primes; a(n) = number of even numbers that appear for the first time in column n. 0
1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 5, 4, 5, 3, 4, 3, 3, 7, 4, 5, 4, 3, 5, 5, 6, 5, 5, 4, 4, 3, 7, 5, 5, 7, 5, 5, 6, 4, 6, 5, 5, 7, 4, 6, 5, 4, 6, 5, 8, 5, 7, 4, 5, 6, 5, 3, 3, 8, 8, 5, 4, 5, 8, 8, 5, 5, 9, 4, 8, 7, 7, 6, 6, 5, 5, 7, 5, 7, 7, 6, 6, 6, 6, 5, 7, 7, 6, 6, 5, 6, 5, 5, 7, 4, 8, 4, 8, 5, 8, 7, 8, 9, 7, 5, 9 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

COMMENTS

The addition table is as follows:

+.|.2..3..5..7..11.......

-------------------------

2.|.4..5..7..9..13..

3.|....6..8..10.14.

5.|.......10.12.16.

7.|..........14.18

11|.............22

CROSSREFS

Sequence in context: A078767 A093125 A156081 * A089881 A084320 A161358

Adjacent sequences:  A105044 A105045 A105046 * A105048 A105049 A105050

KEYWORD

nonn

AUTHOR

Andrew Plewe (aplewe(AT)sbcglobal.net), Apr 06 2005

EXTENSIONS

More terms from Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 19 2005

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Last modified February 17 06:27 EST 2012. Contains 205998 sequences.