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A130512 ABC conjecture: values of rad(a*b*c) in the list of "abc-hits". 11
6, 30, 42, 42, 30, 42, 110, 30, 210, 66, 210, 210, 78, 210, 102, 210, 210, 390, 182, 114, 462, 390, 210, 510, 390, 546, 330, 390, 690, 930, 770, 410, 210, 570, 462, 330, 1122, 1110, 1518, 1230, 690, 1190, 570, 1122, 1122, 834, 2010, 390, 1794, 1974, 510, 210 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
PROG
(Python)
from itertools import count, islice
from math import prod, gcd
from sympy import primefactors
def A130512_gen(): # generator of terms
for c in count(1):
pc = set(primefactors(c))
for a in range(1, (c>>1)+1):
b = c-a
if gcd(a, b)==1 and c>(d:=prod(set(primefactors(a))|set(primefactors(b))|pc)):
yield d
A130512_list = list(islice(A130512_gen(), 30)) # Chai Wah Wu, Oct 19 2023
CROSSREFS
Cf. A130510.
Sequence in context: A027762 A002445 A151711 * A127662 A003062 A327157
KEYWORD
nonn
AUTHOR
T. D. Noe, Jun 01 2007
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)