30856
domain: N
Appears in sequences
- Sum of the first n even squares: a(n) = 2*n*(n+1)*(2*n+1)/3.at n=28A002492
- Even tetrahedral numbers.at n=42A015220
- Expansion of x/(1 - 7*x - 9*x^2).at n=6A015566
- Binomial coefficients C(n,55).at n=3A017719
- Binomial coefficients C(58,n).at n=3A017774
- Number of orbits of the wreath product of S_n with S_n on n X n matrices over {0,1,2,3,4,5}.at n=3A099124
- a(n) = n*(n^3-n^2+n+1)/2.at n=16A100855
- a(n) = A000292(A000292(n)).at n=6A140236
- Tetrahedral numbers n*(n+1)*(n+2)/6 with n, n+1 and n+2 nonprime.at n=16A152622
- a(n) = a(n-1) * (11*a(n-1) - a(n-2)) / (a(n-1) + 4*a(n-2)), a(0) = a(1) = 0, a(2) = 1.at n=7A173731
- E.g.f. sin(cos(x)-1) (even part).at n=6A192007
- a(n) = binomial(3*n + 1,3).at n=18A228887
- Greedy-summable tetrahedral numbers.at n=33A242291
- Number of compositions of n with difference 4 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=10A242844
- The least nonsquarefree number on row n of Pascal's triangle, or 1 if all the terms on that row are squarefree.at n=58A249716
- Partial sums of A255745.at n=24A255766
- Least k such that prime(n) is the smallest prime p for which k^2 + p^2 is also prime, or 0 if none.at n=59A263466
- Array read by antidiagonals: A(n,k) is the number of n element multisets of n element multisets of a k-set.at n=48A331436