33263

Appears in sequences

• Numbers k such that j(k)*phi(k) = sigma(phi(k)), j(k) = A033831(k).at n=8A033856
• Product of 3 successive primes.at n=9A046301
• Product of primes prime(3*n+1), prime(3*n+2), prime(3*n+3).at n=3A061466
• Numbers k such that phi(k) + phi(k+1) divides sigma(k) + sigma(k+1).at n=28A067282
• Numerator of coefficient of (-x^2)^n in F(x)*F(-x) where F(x) = Sum_{k>=0} x^k/(k!)^3.at n=13A068113
• a(n) = 29 + 73*n + 37*n^2.at n=29A145980
• A row sum triangular sequence: A(n,k)= A(n - 1, k - 1) + A(n - 1, k) + (n + 1)*(n + 2)*A(n - 2, k - 1).at n=23A153759
• A row sum triangular sequence: A(n,k)= A(n - 1, k - 1) + A(n - 1, k) + (n + 1)*(n + 2)*A(n - 2, k - 1).at n=25A153759
• Numbers that are a sum of m=3 successive primes and also a product of m=3 (other) successive primes.at n=0A203619
• Smallest integer m such that m is a product of 2n-1 consecutive primes and a sum of 2n-1 consecutive primes.at n=1A206854
• Number of simple unlabeled graphs on n nodes with exactly 8 connected components that are trees or cycles.at n=14A215988
• S_7 sequence in partition of integers > 1 described in A240521.at n=13A240524
• Numbers that are both a sum and a product of two or more consecutive primes.at n=22A254859
• Numbers that are products of at least three consecutive primes.at n=16A257891
• Denominators of Harary index for the n-permutation star graph.at n=25A296057
• Denominators of Harary index for the n-permutation star graph.at n=26A296057
• Denominators of Harary index for the n-permutation star graph.at n=27A296057
• Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.at n=5A304422
• Number of nX6 0..1 arrays with every element unequal to 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.at n=2A304425
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.at n=30A304427