123008

Appears in sequences

• Triangle, read by rows: T(n,k) = (1/2)*Sum_{j=0..2^n-1} j^k for k=0..n-1, n>=1; related to the Prouhet-Tarry-Escott problem.at n=13A140047
• Numbers with prime signature {7,2}, i.e., of form p^7*q^2 with p and q distinct primes.at n=12A179689
• "Late birds" in A390939: terms A390939(m) such that A390939(k) > A390939(m) for all k > m, where A390939 lists the keys added in the map initialized with T[1] = 1 and then repeatedly T[v] := k + (T[v] if defined else 0) for all key-value pairs (k, v) in T.at n=23A390941