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A136607 Odd primitive abundant numbers with only one prime factor 3 and only primes factors == 1 mod 6. 2
6945715839196407, 7516596593102961, 8189724646216659, 26180005855432611, 42208580868962781, 51825725877080883, 55031440879786917, 56085374579306709, 59554573006892691, 61107945437155071 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The sequence A118466 gives n numbers such that n^2+n+1 are abundant numbers. The abundant numbers n^2+n+1 are of the form k*A136607, k with prime factors only == 1 mod 6

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

6945715839196407=3*7*7*13*13*19*31*37*43*61*67*73

7516596593102961=3*7*7*13*13*19*31*37*43*61*67*79

CROSSREFS

Cf. A118466.

Sequence in context: A260751 A233852 A011529 * A257140 A115227 A104836

Adjacent sequences:  A136604 A136605 A136606 * A136608 A136609 A136610

KEYWORD

nonn

AUTHOR

Pierre CAMI, Jan 13 2008

STATUS

approved

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Last modified August 4 20:00 EDT 2020. Contains 336202 sequences. (Running on oeis4.)