513240

Appears in sequences

• Expansion of 1/((1-x)*(1-9*x)*(1-10*x)).at n=5A016261
• a(n) can be expressed as the difference of the squares of consecutive primes in just three distinct ways.at n=25A090783
• Numbers that can be expressed as the difference of the squares of primes in exactly nineteen distinct ways.at n=1A092015
• Irregular triangular array read by rows. T(n,k) is the number of connected labeled bipartite graphs on n nodes with exactly k edges; n >= 1, 0 <= k <= A002620(n+1).at n=49A228861