244035
domain: N
Appears in sequences
- Number of 7-block tricoverings of an n-set.at n=2A060485
- Triangle T(n,k) of k-block tricoverings of an n-set (n >= 3, k >= 4).at n=18A060487
- Numbers k such that k and k+1 have the same sum and number of prime divisors (with repetition).at n=5A064351
- a(n) = n*(n+1)*(2*n^2+1)/6.at n=29A071238
- Triangle read by rows: T(n,k) gives the number of set partitions of {1,...,n} with maximum block length k.at n=58A080510
- a(n) = binomial(n+2,2)*binomial(n+6,2).at n=28A104473
- The average of prime factors of n and n+1 is the same.at n=30A227755
- Number of set partitions of {1,...,n} with largest set of size 4.at n=7A229246