37884

Appears in sequences

• Sum{T(i,n-i): i=0,1,...,n}, array T as in A047150.at n=16A047151
• Kekulé numbers for certain benzenoids.at n=7A110694
• Numbers k such that the sum of the divisors of k and the sum of the distinct prime divisors of k are both a square.at n=31A194196
• Right edge of the triangle A045975.at n=41A204557
• Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by other than plus or minus one modulo n+1.at n=12A269679
• Expansion of Product_{k>=1} 1/(1 - Catalan(k)*x^k), where Catalan = A000108.at n=10A306485
• Number of colored integer partitions of n such that four colors are used and parts differ by size or by color.at n=15A327382
• a(n) = Sum_{i=1..n} nac(i,n) where nac(i,n) is the n-th i-bonacci number. The n-th i-bonacci number here is equal to 1 for the first i terms, with subsequent terms equaling the sum of the previous n terms.at n=16A345372
• Triangle read by rows. The coefficients of the Hahn polynomials in ascending order of powers. T(n, k) = n! * [x^k] hypergeom([-x, -n, n + 1], [1, 1], 1).at n=33A358624
• Diagonal of rational function 1/(1 - (x^3 + y^3 + x^4*y)).at n=22A361488
• Consecutive internal states of the linear congruential pseudo-random number generator (421*s + 54773) mod 259200 when started at 1.at n=31A383129