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A083396
Least n such that n and 2k+n are both brilliant numbers.
0
4, 6, 4, 6, 4, 9, 21, 9, 169, 15, 121, 25, 9, 21, 289, 221, 15, 253, 209, 9, 247, 143, 253, 121, 341, 169, 323, 437, 319, 187, 299, 649, 121, 221, 253, 49, 377, 247, 143, 209, 391, 169, 35, 121, 209, 299, 49, 25, 221, 21, 187, 143, 15, 35, 143, 9, 209, 377, 25, 49, 21
OFFSET
1,1
COMMENTS
Conjecture: for any k >= 1 there will always be a brilliant constellation of the form {n, 2k+n} for some n. (True for all k <= 5000.)
EXAMPLE
a(9)=169 because 169=13*13 and 169+18=11*17.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Jason Earls, Jun 06 2003
STATUS
approved