57276

Appears in sequences

• a(n) = T(n) concatenated with reverse(T(n)) divided by 11, where T(n) is the n-th triangular number.at n=35A084008
• G.f.: A(x) = 1 + x*A(x)^2/(1-x-x^2).at n=9A084782
• Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^4.at n=32A341243