23411

Appears in sequences

• Expansion of 1/((1-x)(1-7x)(1-9x)).at n=4A016250
• Squarefree conductors of quintic fields.at n=18A085715
• a(n) = 15*n*(n+1) + 11.at n=39A132208
• A linear combination of Eulerian numbers (A008292) and Pascal's triangle (A007318); t(n,m)=(3*A008292(n,m)-A007318(n,m))/2.at n=31A141691
• A linear combination of Eulerian numbers (A008292) and Pascal's triangle (A007318); t(n,m)=(3*A008292(n,m)-A007318(n,m))/2.at n=32A141691
• Integers of the form 4n+3 for which Sum_{i=1..u} J(i,4n+3) obtains value zero exactly 7 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol.at n=29A166057
• a(n) = n*(14*n-3).at n=41A185019
• Values of x in A216363.at n=33A216382
• Numbers that can be written in more than 1 way as p^2 + 3pq + q^2 with primes p < q.at n=14A218795
• Sum of smallest parts of all partitions of n into an even number of parts.at n=40A222045
• Expansion of Sum_{k>=0} (-1)^k * x^(2*k)/Product_{j=1..k} (1 - j * x).at n=15A353260
• Semiprimes of the form k^2 + 2.at n=42A360739