135124

Appears in sequences

• G.f.: (1+x+x^2+x^3)/(1-x^2-2*x^3-x^4+x^6).at n=26A234273
• a(n) is the number of numbers less than or equal to 10^n that are divisible only by primes congruent to 3 mod 4.at n=5A369107