20927

Appears in sequences

• a(n) = d(n)/2, where d = A026040.at n=47A026041
• a(n) = 8*a(n-1)-13*a(n-2) for n > 1; a(0) = 5, a(1) = 23.at n=5A162815
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2)*b(n), where a(0) = 2, a(1) = 3, b(0) = 1, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=14A296269
• Number of proper multisets of nonempty words with a total of n letters over n-ary alphabet such that if a letter occurs in the multiset all predecessors occur at least once.at n=5A320265
• Number of positive solutions to (x_1)^2 + (x_2)^2 + ... + (x_6)^2 <= n^2.at n=6A341425