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A248712 Numbers n that are the product of four distinct primes such that x^2+y^2 = n has integer solutions. 3
2210, 3770, 4810, 4930, 5330, 6290, 6890, 6970, 7930, 9010, 9490, 10370, 10730, 11570, 11890, 12410, 12610, 12818, 13130, 14170, 14690, 15130, 15170, 15370, 16354, 16490, 17170, 17690, 17810, 18122, 18530, 19210, 19370, 19610, 20410, 21170, 21730, 22490 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Union of 2*A264498 and A264499. - Ray Chandler, Dec 09 2019
LINKS
EXAMPLE
2210 is in the sequence because 2210 = 2*5*13*17, and x^2+y^2=2210 has integer solutions (x,y) = (1,47), (19,43), (23,41) and (29,37).
32045 is in the sequence because x^2 + y^2 = 32045 = 5*13*17*29 has solutions (x,y) = (2,179), (19,178), (46,173), (67,166), (74,163), (86,157), (109,142) and (122,131).
CROSSREFS
Sequence in context: A216408 A043659 A178458 * A226562 A300166 A031772
KEYWORD
nonn
AUTHOR
Colin Barker, Oct 12 2014
STATUS
approved

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Last modified May 26 18:19 EDT 2024. Contains 372840 sequences. (Running on oeis4.)