159077

Appears in sequences

• Numbers n such that n'' = n'+1 where n' and n'' are respectively the first and the second arithmetic derivative of n (A003415).at n=35A189639
• Number of dispersed Dyck paths of semilength n (i.e., Motzkin paths of length n with no (1,0)-steps at positive heights) having no UUU's (U=(1,1)).at n=21A191519
• Numbers k for which sigma(k) = k + k'', where k'' is the second derivative of k (A068346).at n=36A348426