57302

Appears in sequences

• Number of partitions of n into at most 1 copy of 1, 2 copies of 2, 3 copies of 3, ... .at n=55A052335
• Sum_{k<=n} (sigma(k)^2), where sigma(k) denotes the sum of the divisors of k A000203.at n=38A072379
• Number of 3 X 3 X 3 triangular 0..n arrays with every horizontal row nondecreasing and having the same average value.at n=38A214907
• Number of 5 X n 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=20A224041
• Number of Carlitz compositions of n with exactly one descent.at n=34A241691
• a(0) = 1, a(1) = 2; for n>1, a(n) = a(n-1) + a(n-2) + floor(n/2).at n=21A281362