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A049716 2*n+1-prevprime(2*n+1). +0
5
1, 2, 2, 2, 4, 2, 2, 4, 2, 2, 4, 2, 4, 6, 2, 2, 4, 6, 2, 4, 2, 2, 4, 2, 4, 6, 2, 4, 6, 2, 2, 4, 6, 2, 4, 2, 2, 4, 6, 2, 4, 2, 4, 6, 2, 4, 6, 8, 2, 4, 2, 2, 4, 2, 2, 4, 2, 4, 6, 8, 10, 12, 14, 2, 4, 2, 4, 6, 2, 2, 4, 6, 8, 10, 2, 2, 4, 6, 2, 4, 6, 2, 4, 2, 4, 6, 2, 4, 6, 2, 2, 4 (list; graph; listen)
OFFSET

1,2

EXAMPLE

n...: 1 2 3 4 .5 .6 .7 .8 ...

2n+1: 3 5 7 9 11 13 15 17 ...

pp..: 2 3 5 7 .7 11 13 13 ...

diff: 1 2 2 2 .4 .2 .2 .4 ...

CROSSREFS

Cf. A049613, A049653, A049711, A049847.

Adjacent sequences: A049713 A049714 A049715 this_sequence A049717 A049718 A049719

Sequence in context: A102445 A027389 A160691 this_sequence A066671 A159802 A049627

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 8 19:30 EST 2009. Contains 166227 sequences.


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