231525

Appears in sequences

• sin(log(x+1)-arctanh(x))=-1/2!*x^2-6/4!*x^4-105/6!*x^6-3780/8!*x^8...at n=4A013294
• Odd nonunitary abundant numbers.at n=3A094889
• Expansion of g.f.: (1+x^2)*(1+2*x^2)*(1+3*x^2)*(1+4*x^2)/(1-5*x+10*x^2 -40*x^3+35*x^4-105*x^5 +50*x^6-100*x^7+24*x^8-24*x^9).at n=8A123894
• Numbers with prime factorization p^2*q^3*r^3 where p, q, and r are distinct primes.at n=22A190106
• Integers whose arithmetic derivative is equal to their Dedekind function.at n=20A301939
• Numbers such that the list of exponents of their factorization is a palindromic list of primes.at n=31A322525
• Odd coreful abundant numbers: the odd terms of A308053.at n=2A339936
• Primitive coreful Zumkeller numbers: coreful Zumkeller numbers (A339979) having no coreful Zumkeller aliquot divisor.at n=22A339981
• Numbers k for which A344998(k) = A344999(k).at n=24A345003
• Odd numbers whose arithmetic derivative (A003415) is equal to Dedekind psi (A001615) applied to the same number.at n=3A345005