190968

Appears in sequences

• a(n) can be expressed as the difference of the squares of consecutive primes in just three distinct ways.at n=12A090783
• Triangle of coefficients of q in e.g.f. that satisfies: A(x,q) = exp( q*x*A(q*x,q) ), read by rows of [n*(n-1)/2 + 1] terms in row n for n>=0.at n=71A126265
• A diagonal of triangle A126265: a(n) = A126265(n+1,n).at n=7A126266
• a(n) is the smallest number which can be represented as the sum of n distinct nonzero n-gonal numbers in exactly n ways, or 0 if no such number exists.at n=29A350405