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A104102 Number of primes >= p(n)# and < p(n)# + p(n+1)^2 where p(i)=i-th prime, p(i)#=i-th primorial. +0
1
4, 7, 11, 21, 24, 29, 25, 38, 42, 37, 58, 54, 45, 60 (list; graph; listen)
OFFSET

1,1

COMMENT

Conjecture: a(n) is alway > p(n+1)

EXAMPLE

p(1)#=2 p(1)#+p(2)^2=11 2 3 5 7 are >=2 and <11 so a(1)=4

p(2)#=6 p(2)#+p(3)^2=31 7 11 13 17 19 23 29 are >=6 and < 31 so a(2)=7

CROSSREFS

Adjacent sequences: A104099 A104100 A104101 this_sequence A104103 A104104 A104105

Sequence in context: A091176 A002974 A130625 this_sequence A074705 A128836 A061956

KEYWORD

nonn

AUTHOR

Pierre CAMI (pierrecami(AT)tele2.fr), Mar 04 2005

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Last modified May 20 13:35 EDT 2008. Contains 140028 sequences.


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