31820

Appears in sequences

• Numerators of continued fraction convergents to sqrt(397).at n=5A041754
• Number of 5-gonal compositions of n into positive parts.at n=34A069983
• Average of 4 primes where the integer Schwarzian derivative is zero.at n=33A094903
• Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+4x+4y>0.at n=20A211626
• Number of ordered triples (w,x,y) with all terms in {-n, ..., -1, 1, ..., n} and 4w + x + y > 0.at n=20A211629
• a(n) = Sum_{-n<i<n, -n<j<n, gcd{i,j}=3} (n-|i|)*(n-|j|).at n=25A331774
• Number of integer partitions of n such that either the run-lengths or the negated run-lengths are unimodal.at n=41A332746
• Triangle of numbers read by rows: T(n,k) = Sum_{i=0..n} binomial(n,i)*(n-i)!*Stirling1(i,k)*TC(n,i) where TC(n,k) = Sum_{i=0..n-k} binomial(n+1,n-k-i)*Stirling2(i+3,i+1)*(-1)^(i) for n >= 0, 0 <= k <= n.at n=58A370518