148995

Appears in sequences

• Binomial coefficient C(3n,n-11).at n=4A004329
• Binomial coefficient C(5n,n-5).at n=4A004347
• Binomial coefficient C(45,n).at n=4A010961
• a(n) = binomial coefficient C(n,41).at n=4A010994
• Binomial coefficients binomial(2*n-3,4).at n=20A053126
• Number triangle T(n,k) = (-1)^(n-k)*[k<=n]*Product_{i=k+1..n} Sum_{j=0..i-1} A078008(j-1).at n=29A128210
• One-half of averages of twin prime pairs of A001318.at n=30A154565
• Denominator of a-sequence for Sheffer triangle A060081.at n=42A176727
• Number of ways to choose 4 points in an n X n X n triangular grid.at n=6A234249
• a(n) = A239793(n)/2^(3*n).at n=21A239795
• From higher-order Bernoulli numbers: denominator of the D-number D2n(2n-1).at n=20A261272
• From higher-order Bernoulli numbers: denominator of D Number D2n(2n).at n=21A261274
• Product of first n nonzero Jacobsthal numbers (A001045).at n=6A269694
• Number of interior points that are the intersections of exactly two chords in the configuration A006561(n).at n=44A292104
• G.f.: Sum_{n>=0} (n+1)*(n+2)*(n+3)*(n+4)/4! * x^n * (1 + x^n)^n.at n=41A326005
• a(n) = Sum_{i+j<=m+1} t_i * t_j, where t_1 < ... < t_m are the totatives of n.at n=42A341063
• a(n) = denominator(4^n * n! * [x^n] sqrt(x / (e^x - 1))).at n=42A365671