4117715

Appears in sequences

• Triangle of coefficients in expansion of (5+7x)^n.at n=34A013626
• Numbers whose prime factors are 5 and 7.at n=29A033851
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*5^j.at n=29A038271
• a(n) = n^n * (n + 2 - (1/12) * (n^2-1)).at n=6A080290
• a(n) = n^n*(3+n)/2.at n=6A174962
• Solutions of the equation n" - n' - n = 0, where n' and n" are the first and second arithmetic derivatives (see A003415).at n=11A188145
• a(n) = 5*7^n.at n=7A193577
• Expansion of g.f. (1-2*x)/(1-7*x).at n=8A196661
• a(n) = [x^n] Product_{k>=1} (1 + n^k*x^k).at n=7A292305
• a(n) is the position of the first occurrence of n in A323077.at n=27A334198
• Numbers which contain the "Look and Say" description (cf. A045918) of all their prime factors, counted with multiplicity.at n=5A367974