27475

Appears in sequences

• If mod[n,4]=0 then a(n)=a(n-1), if mod[n,4]=1 then a(n)=a(n-2)+a(n-3), if mod[n,4]=2 then a(n)=a(n-3)+a(n-4)+a(n-5), if mod[n,4]=2 then a(n)=a(n-4)+a(n-5)+a(n-6)+a[n-7].at n=38A104205
• Expansion of Product_{k>=1} (1-x^k)*(1+x^k)^4.at n=28A261998
• Numbers k such that (178*10^k - 7)/9 is prime.at n=20A290955
• Numbers m such that m^2 = p^2 + k^2, with p > 0, where p = A007954(m) = the product of digits of m.at n=23A334542
• G.f. A(x) satisfies A(x) = 1 + x*A(x)^4 / (1 - x*A(x)^5).at n=6A364765