23231

Appears in sequences

• Expansion of 1/((1-3x)(1-4x)(1-10x)).at n=4A016981
• E.g.f.: -exp(-x/(1-2*x))/(1-2*x).at n=6A025166
• Denominators of continued fraction convergents to sqrt(527).at n=6A042009
• Number of numbers below 10^n with nonzero multiplicative digital root 6.at n=4A051826
• a(n) = 48*n^2 - 1.at n=22A065532
• Rounded volume of a regular icosahedron with edge length n.at n=22A071402
• Triangle, read by rows, that transforms the (n+m)-dimensional partitions of n into the (n+m+1)-dimensional partitions of n, for fixed m.at n=46A096801
• Column 1 of triangle A096801, which transforms the (n+m)-dimensional partitions of n into the (n+m+1)-dimensional partitions of n, for any fixed m.at n=8A096803
• Riordan array (1/(1-xc(2x)),xc(2x)/(1-xc(2x))), c(x) the g.f. of A000108.at n=29A110506
• Riordan array (1/(1+xc(-2x)), xc(-2x)/(1+xc(-2x))), c(x) the g.f. of A000108.at n=29A114189
• Numbers such that the digital sum base 2 and the digital sum base 3 and the digital sum base 10 all are equal.at n=25A135120
• Numbers such that the digital sum base 2 and the digital sum base 5 and the digital sum base 10 all are equal.at n=21A135125
• Numbers such that the digital sums in bases 2, 3, 5 and 10 all are equal.at n=4A135128
• Semiprimes formed by concatenating n, n, and 1 for n = 1, 2, 3,....at n=9A210711
• Expansion of Sum_{n>=0} x^n * Sum_{k=0..n} C(n,k)^2 * x^(4*k).at n=22A246884
• Number of (n+1) X (4+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=11A250725
• Sum of the fifth largest parts of the partitions of n into 10 parts.at n=44A326594
• Numerator of the expected height of a random binary search tree (BST) with n elements.at n=11A374811