87135

Appears in sequences

• Array read by antidiagonals: T(n,k) = number of barred preferential arrangements of k things with n bars (k >=0, n >= 0).at n=42A226513
• Row 2 of array in A226513.at n=6A226515
• Column 6 of array in A226513.at n=2A226801
• Solution of the complementary equation a(n) = 2*a(n-2) + b(n-1), where a(0) = 1, a(1) = 3, b(0) = 2, and (a(n)) and (b(n)) are increasing complementary sequences.at n=27A295066