25851

Appears in sequences

• Number of 5-tuples of different integers from [ 1,n ] with no global factor.at n=21A015640
• Number of 5-tuples of different integers from [ 2,n ] with no global factor.at n=21A015641
• Numbers k such that 3^k + 4 is prime.at n=24A058958
• Expansion of Sum_{n>=0} x^n * Sum_{k=0..n} C(n,k)^2 * x^(5*k).at n=25A248193
• Expansion of (1 + 6*x + x^2 + 12*x^3 - 2*x^4)/((1 - x)^4*(1 + x)^3).at n=40A268579
• Irregular triangle read by rows, giving the numerators of the coefficients of the Eisenstein series G_{2*n} multiplied by 2*n-1, for n >= 2. Also Laurent coefficients of Weierstrass's P function.at n=29A274342
• Expansion of Product_{k>=1} ((1 + x^(2*k-1))/(1 - x^(2*k)))^k.at n=26A295832
• Number of separable partitions of n in which the number of distinct (repeatable) parts is > 5.at n=44A325720