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A176903
Primes of the form colossally abundant number + 1.
0
3, 7, 13, 61, 2521, 55441, 4324321, 367567201, 6064949221531201, 9200527969062830401, 37188534050951960476801, 8201519488959040182625924708238885435575055666675808001
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OFFSET
1,1
COMMENTS
The next term is too large to be displayed here.
The n-th colossally abundant number + 1 is prime for n = 1, 2, 3, 4, 7, 9, 12, 14, 21, 23, 26, 46, 65, 69, 143, 147.
LINKS
Table of n, a(n) for n=1..12.
FORMULA
{
A004490
(i) + 1} INTERSECTION
A000040
.
EXAMPLE
A004490
(12) = 4324320, and 4324320 + 1 = 4324321 is prime.
A004490
(46) + 1 = 8201519488959040182625924708238885435575055666675808001 is prime.
CROSSREFS
Cf.
A000040
,
A004490
,
A136669
,
A181561
,
A181562
.
Sequence in context:
A103564
A083201
A228209
*
A004060
A028491
A137474
Adjacent sequences:
A176900
A176901
A176902
*
A176904
A176905
A176906
KEYWORD
nonn
AUTHOR
Jonathan Vos Post
, Jan 31 2011
STATUS
approved
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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)