343059613650
domain: N
Appears in sequences
- Catalan numbers with odd index: a(n) = binomial(4*n+2, 2*n+1)/(2*n+2).at n=11A024492
- Quotient C[p(n),{p(n)+-1}/2]/p(n), where p(n)=n-th prime.at n=13A075891
- Number of fixed points in range [A014137(n-1)..A014138(n-1)] of permutation A089851/A089853.at n=24A089848
- a(1) = 1; a(n) = floor {(n+1)(n+2)(n+3)...(n+k)}/{(n-1)(n-2)(n-3)...(n-k)} for the least value of k.at n=23A092935
- Numerators of even raw moments in the distribution of line lengths for lines picked at random in the unit disk.at n=22A093526
- Expansion of 1 + 2x/(1 + sqrt(1 - 4x^2)).at n=47A097331
- Second column and subdiagonal of number triangle A098509.at n=23A098512
- G.f. is 1 + x*c(x), where c(x) is the g.f. of the Catalan numbers (A000108).at n=24A120588
- Catalan numbers (A000108) interpolated with 0's.at n=46A126120
- Sum of all n-digit Catalan numbers.at n=11A131468
- The matrix-vector product A133566 * A000108.at n=23A133603
- Even Catalan numbers.at n=18A152670
- Number of Dyck paths of semilength n with a valley (DU) spanning the midpoint.at n=23A186031
- a(n) = C(n) if n is odd, else C(n) - C(n/2); C(n) are Catalan numbers.at n=22A187916
- First terms of first rows of zigzag matrices as defined in A088961.at n=21A230585
- a(n) = binomial(2*(n+1),n) * gcd(n,2)/(2*(n+1)).at n=22A234040
- Catalan(prime(n)).at n=8A246669
- Number of preference profiles with 4 alternatives and n agents (IANC model).at n=23A296260
- Catalan numbersat n=23