-998

Appears in sequences

• Percolation series for f.c.c. lattice.at n=15A006806
• O.g.f.: exp( Sum_{n>=1} -(sigma(2*n^2) - sigma(n^2)) * (-x)^n/n ).at n=28A215603
• Triangle in which row n consists of the coefficients in Sum_{m=0..n} x^m * Product_{k=m+1..n} (1-k*x), as read by rows.at n=26A248925
• Row sums of A291955.at n=44A291956
• Expansion of Product_{k>=1} (1 - x^k)^(k+1).at n=33A299019