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A062702
Index of factorial primes of form m!-1.
1
3, 9, 128, 675, 25306287, 3610490805
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..6.
FORMULA
a(n) = PrimePi(
A002982
(n)!-1) =
A000720
(
A055490
(n)).
EXAMPLE
The exact subscript of 7th prime [=30!-1=265252859812191058636308479999999] is not yet available.
CROSSREFS
Cf.
A002981
,
A002982
,
A055490
.
Sequence in context:
A291704
A351264
A082606
*
A289169
A257032
A141143
Adjacent sequences:
A062699
A062700
A062701
*
A062703
A062704
A062705
KEYWORD
hard
,
nonn
AUTHOR
Labos Elemer
, Jul 11 2001
EXTENSIONS
Offset 1 from
Michel Marcus
, Aug 29 2019
STATUS
approved
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Last modified August 18 15:26 EDT 2024. Contains 375269 sequences. (Running on oeis4.)