243542

Appears in sequences

• Expansion of (1+x)/(1-x)^12.at n=9A057788
• a(n) = a(n-3) + A001654(n-1) with a(0)=0, a(1)=0 and a(2)=1.at n=15A115730
• Number of positive clusters of type D_n.at n=10A129869
• Sum of root degrees of all symmetric ordered trees with n edges.at n=18A143360
• Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive step pattern up, down, down, up; triangle T(n,k), n>=0, 0<=k<=max(0,floor((n-2)/3)), read by rows.at n=19A230695
• Stepped path in P(k,n) array of k-th partial sums of squares (A000290).at n=17A259775
• Numbers k such that binomial(k^2,k) == 0 (mod k^3).at n=41A371474