110160

Appears in sequences

• Weight distribution of [ 18,9,8 ] self-dual code over GF(4).at n=7A014487
• a(n) = n + (n+1)^2 + (n+2)^3 + (n+3)^4.at n=15A027621
• a(n) = A062401(A065391(n)): phi(sigma(m)) peak values for numbers m (listed in A065391) at which those peaks are first reached.at n=31A065392
• Expansion of 1/(1-3x+3x^3) in powers of x.at n=12A090400
• Triangle read by rows: T(n,k) is the coefficient of x^k of the polynomial n(n-x)(n-2x)(n-3x)...(n-(n-1)x) (n>=1, 0<=k<=n-1).at n=17A123670
• Triangle read by rows: t(n,m) = binomial(2*n,2*m) * binomial(n,m).at n=47A155495
• Triangle read by rows: t(n,m) = binomial(2*n,2*m) * binomial(n,m).at n=52A155495
• Integers with exactly 100 divisors.at n=4A163816
• Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p_1, p_2, p_3, p_4} = {-2,0,1,2}, n=3*r+p_i, and define a(-2)=1. Then a(n)=a(3*r+p_i) gives the quantity of H_(9,1,0) tiles in a subdivided H_(9,i,r) tile after linear scaling by the factor Q^r, where Q=sqrt(x^2-1) with x=2*cos(Pi/9).at n=45A187499
• Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p_1, p_2, p_3, p_4} = {-2,0,1,2}, n=3*r+p_i, and define a(-2)=0. Then a(n)=a(3*r+p_i) gives the quantity of H_(9,2,0) tiles in a subdivided H_(9,i,r) tile after linear scaling by the factor Q^r, where Q=sqrt(x^2-1) with x=2*cos(Pi/9).at n=43A187500
• Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p_1, p_2, p_3, p_4} = {-2,0,1,2}, n=3*r+p_i, and define a(-2)=0. Then a(n)=a(3*r+p_i) gives the quantity of H_(9,3,0) tiles in a subdivided H_(9,i,r) tile after linear scaling by the factor Q^r, where Q=sqrt(x^2-1) with x=2*cos(Pi/9).at n=42A187501
• a(n) = n!*(!n - 1) = n! * Sum_{k=1..n-1} k!.at n=6A217239
• Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have a' * b' = k, where a' and b' are the arithmetic derivatives of a and b.at n=15A259675
• Number of balanced enriched p-trees of weight n.at n=18A320169
• Race of lucky numbers of the form 4*k - 1 vs. 4*k + 1 is tied at the a(n)-th lucky number.at n=25A330359
• Triangle read by rows. T(n, k) = n^k * |Stirling1(n, k)|.at n=25A355007
• Numbers that have exactly two exponents in their prime factorization that are equal to 4.at n=36A386805
• a(n) = 2*n*binomial(n, 4).at n=17A391978