116252

Appears in sequences

• Let S(n)=sigma(|n|)-2*n; sequence gives numbers n such that S(S(S(S(n))))=n. May be called {2,1}-Sociable number of orders 1 or 2 or 4.at n=11A113285
• a(n) are half the sums of the gamma coefficients of the n-th row-generating function of triangle A375853.at n=9A376072