763686domain: NAppears in sequencesFermat coefficients.at n=26A000971a(n) = 9*binomial(10*n+9,n)/(10*n+9).at n=5A234573Number of compositions of n with exactly two occurrences of the largest part.at n=21A243737a(n) = n*(n+1)*(n+2)*(n+3)*(n^2+3*n+26)/720.at n=26A257200