39837

Appears in sequences

• a(n) is the number of subsequences {s(k)} of {1,2,3,...n} such that s(k+1)-s(k) is 1 or 3.at n=23A050228
• Binomial transform of [1, 5, 10, 10, 5, 1, 1, -1, 1, -1, 1, ...].at n=18A140228
• Expansion of Sum_{n>=0} x^n * Sum_{k=0..n} C(n,k)^2 * x^(4*k).at n=23A246884
• Total number of corners in all partitions of n. A corner of a partition is a point of degree two in the corresponding Ferrers diagram.at n=29A265258