2629575
domain: N
Appears in sequences
- a(n) = binomial coefficient C(n,7).at n=24A000580
- From generalized Catalan numbers.at n=8A006631
- Binomial coefficient C(31,n).at n=7A010947
- Binomial coefficient C(31,n).at n=24A010947
- a(n) = binomial coefficient C(n,24).at n=7A010977
- a(n) = binomial(n, floor(n/4)).at n=31A051036
- T(n,7), array T as in A050186; a count of aperiodic binary words.at n=24A051192
- Binomial coefficients C(2*n+7,7).at n=12A053136
- a(n) = binomial(sigma(n+1), sigma(n)).at n=14A078504
- Number of connected ordered 5-element T_0-antichains on an unlabeled n-set.at n=24A092608
- Triangle, read by rows, where T(n,k) = binomial(n*(n-1)/2 - k*(k-1)/2 + n-k+3, n-k).at n=28A107873
- Column 0 of triangle A107873; a(n) = C( n*(n-1)/2 + n+3, n).at n=7A107874
- G.f.: (1-16*x+28*x^2+56*x^3-140*x^4+56*x^5+28*x^6-16*x^7+x^8)/(x^2-x+1)^8.at n=24A112403
- Triangle read by rows: T(n,k) = binomial(4n-k,n-k), 0 <= k <= n.at n=37A119304
- Sum{k>=0, C(2^k-1,n-2*(2^k-1))}.at n=69A119969
- a(n) = binomial(prime(4+n), prime(4)).at n=7A126997
- The 3rd Witt transform of A000217.at n=26A147618
- a(n) = binomial(n, A002024(n+1)-1) where A002024 is "n appears n times".at n=31A180272
- a(n) = binomial(4*n,n)/4.at n=7A224274
- Number of ways to choose a multiset of n divisors of n.at n=23A343935