1042432domain: NAppears in sequencesHalf the number of permutations of 0..n with exactly two maxima.at n=11A10057510th-order Fibonacci numbers: a(n+1) = a(n)+...+a(n-9) with a(0) = ... = a(8) = 0, a(9) = 1.at n=30A122265Number of compositions (ordered partitions) of n into parts not greater than n/2.at n=21A368484