32781

Appears in sequences

• A simple grammar: rooted ordered set partitions.at n=7A052882
• a(n) = 2^(n+1) + n - 1.at n=14A083706
• Expansion of x^2*(1 + 2*x - x^2)/(1 - x - 3*x^2 - x^3 + x^4).at n=13A120748
• Duplicate of A083706.at n=14A122039
• Partial sum of centered tetrahedral numbers A005894.at n=20A132366
• Triangle read by rows, T(n, k) = binomial(n, k) * Sum_{j=0..n-k} E(n-k, j)*2^j, where E(n, k) are the Eulerian numbers A173018(n, k), for 0 <= k <= n.at n=29A154921
• Triangle relating to ordered Bell numbers, A000670.at n=27A208744
• Total number of parts of multiplicity 8 in all partitions of n.at n=47A222708
• Number of 3 X n 0..1 arrays with rows unimodal and antidiagonals nondecreasing.at n=13A224410
• Numbers k such that k^2 +- k +- 1 is prime for all four possibilities.at n=12A236056
• Numbers n such that a digit of n to the power k plus the sum of the other digits of n equals n, where k is a positive integer.at n=19A257860
• Triangle read by rows: T(n,k) is the number of labeled loop-threshold graphs on vertex set [n] with k components, for n >= 1 and 1 <= k <= n.at n=22A350531