30901

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 13.at n=28A031601
• Partial sums of A213709.at n=18A218600
• E.g.f.: exp(1/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)*(1-x^5)) - 1).at n=6A294216
• Numbers k such that k and k+2 are both A000120-perfect numbers (A175522).at n=38A360639