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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 (list; graph; refs; listen; history; text; internal format)
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
FORMULA
{A004490(i) + 1} INTERSECTION A000040.
EXAMPLE
A004490(12) = 4324320, and 4324320 + 1 = 4324321 is prime.
A004490(46) + 1 = 8201519488959040182625924708238885435575055666675808001 is prime.
CROSSREFS
Sequence in context: A103564 A083201 A228209 * A004060 A028491 A137474
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.)