130917

Appears in sequences

• a(n) = 1 + Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} i^(j+k).at n=3A133298
• Expansion of e.g.f. (exp(x)-1)*(exp(x) - x^2/2 - x - 1).at n=17A342352