261720

Appears in sequences

• a(n) = Sum_{k=0..n-3} T(n,k) * T(n,k+3), with T given by A026648.at n=7A026974
• Square array read by upward antidiagonals in which T(w,p) is the smallest number k whose symmetric representation of sigma(k) consists of p parts with maximum width w occurring in everyone of its p parts.at n=16A348142
• Square array read by upward antidiagonals in which T(w,p) is the smallest number k whose symmetric representation of sigma(k) consists of p parts with maximum width w occurring in at least one of its p parts.at n=16A348171