31085

Appears in sequences

• Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 19.at n=18A051984
• G.f.: Product_{k>0} (1+x^k)/((1-x^k)*(1+x^(3k))*(1+x^(5k))).at n=29A100823
• Number of conjugacy class of index n subgroups in PSL_2 (ZZ).at n=22A121350
• Let f(m) = number of steps needed to reach a Harshad number when the map k->A062028(l) is iterated starting at m; a(n) = smallest m such that f(m) = n.at n=98A181664
• a(n) = number of semistandard Young tableau families, headed by a father SSYT, containing daughter SSYT of shape equal to once-trimmed father's shape, so that union of families equals all SSYT with sum of entries n.at n=26A228129
• Numbers n such that 6^n-5^(n+1) is prime.at n=16A272781
• 9*n analog to Keith numbers.at n=16A282764
• Number of integer partitions of n that are either constant or relatively prime.at n=39A338553