65596

Appears in sequences

• Let M(n) be the n X n matrix m(i,j)=min(i,j) for 1<=i,j<=n; then a(n) is the trace of M(n)^(-7).at n=20A114359
• a(n) = 1 + sum{k=1 to n} A177268(k).at n=16A177269
• Numbers that are values of the totient function (A002202) but not of the reduced totient function (A002174).at n=21A270265