40463

Appears in sequences

• Composite and every divisor (except 1) contains the digit 4.at n=25A062670
• G.f.: 1/(1 - x/(1 - x^3/(1 - x^6/(1 - x^10/(1 - x^15/(1 - x^21/(1 -...- x^(n*(n+1)/2)/(1 -...))))))), a continued fraction.at n=29A206740