23961

Appears in sequences

• Expansion of 1/((1-2*x)*(1-5*x)*(1-10*x)).at n=4A016299
• Difference between A007678(2n)/(2n) and (n-1)^2.at n=43A085611
• Number of partitions of n into parts not greater than sqrt(n).at n=53A097356
• Matrix square, T(n,k), of Parker's partition triangle A047812, read by rows (n >= 1 and 0 <= k <= n-1).at n=31A128567
• Second elementary symmetric function of the first n terms of (1,2,2,3,3,4,4,5,5...).at n=26A203298
• Number of 2 X 2 matrices with all elements in {-n,..,0,..,n} with permanent = determinant * n.at n=35A280407
• Numbers k such that all digits in k are different and for each digit d it is true that k = d (mod sum of digits(k) - d).at n=23A306788
• Number of partitions of positive integer n such that all parts are less than the square root of n.at n=52A316353
• G.f.: Sum_{n>=0} (n+1)*(n+2)/2 * x^n * (1 + x^n)^n.at n=50A326003
• Number of induced cycles in the 4 X n grid graph.at n=13A360197
• Numbers m such that 20*m + 1, 80*m + 1, 100*m + 1, and 200*m + 1 are all primes.at n=30A372186
• Number of spiny partitions with exactly n parts.at n=13A383895