225073

Appears in sequences

• a(n) = a(n-1) + a(n-2) + 2 where a(0) = a(1) = 1.at n=24A111314
• Row sums of A131325.at n=24A131326
• a(n) = least semiprime such that all subsets of {a(1),...,a(n)} have a different sum.at n=17A137371
• Sequence a(n) = 3*A002559(n) - 2 determining the principal reduced indefinite binary quadratic form [1, a(n), -a(n)] for Markoff triples.at n=29A324250