31057

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 39.at n=1A031627
• Multiplicity of highest weight (or singular) vectors associated with character chi_91 of Monster module.at n=45A034479
• Interprimes (A024675) which are of the form s*prime, s=13.at n=16A075288
• Partial sums of A080182.at n=17A080183
• Number of nX6 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=7A318073
• Number of nonempty subsets of {1, 2, ..., n} with GCD equal to 1 and containing the sum of any two elements whenever it is at most n.at n=25A358392