41945

Appears in sequences

• Number of partitions of 2n with all subsums different from n.at n=29A006827
• Numbers k such that 251*2^k+1 is prime.at n=17A032502
• Number of subsets of {1,2,3,...,n} that sum to 0 mod 25.at n=20A068043
• Number of n X 4 0..1 arrays with rows and columns unimodal and antidiagonals nondecreasing.at n=10A223773
• Numbers n such that (23*10^n - 26)/6 is prime.at n=16A253968
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 779", based on the 5-celled von Neumann neighborhood.at n=32A273540
• Irregular triangle read by rows where T(n,k) is the number of uniform multiset partitions of a multiset with d = A027750(n,k) copies of each integer from 1 to n/d.at n=54A322788
• Triangle read by rows: T(n,k) is the number of inequivalent colorings of lone-child-avoiding rooted trees with n colored leaves using exactly k colors.at n=30A339645
• a(n) = n! * Sum_{k=1..n} Sum_{d|k} (-1)^(d+1)/(d * (k/d)!).at n=7A356401
• a(n) = Sum_{j=1..n} Sum_{k=1..n} phi(2*j*k) / phi(k).at n=39A372664