22006

Appears in sequences

• a(n) = T(n,n-5), array T as in A055807.at n=21A055810
• a(n) = Sum_{k=1..n-1} sigma_3(k)*sigma_5(n-k).at n=5A279888
• a(n) = number of segments (edges) in the configuration A290447(n).at n=24A290866
• Solution of the complementary equation a(n) = a(n-1) + 2*a(n-2) + b(n-1), where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, and (a(n)) and (b(n)) are increasing complementary sequences.at n=13A295147