-214

Appears in sequences

• cos(arcsinh(x)+tan(x))=1-4/2!*x^2+8/4!*x^4-214/6!*x^6+8632/8!*x^8...at n=3A013096
• a(n) = 3^n - n^4.at n=7A024027
• Expansion of q^(-1/2) * (eta(q) * eta(q^3))^3 in powers of q.at n=54A030208
• Second differences of sigma(n).at n=58A053223
• Let n be a positive integer, n>3. Define a tournament on the vertex set {2,3,..,n} by: for i < j, i is adjacent to j if i divides j, else j is adjacent to i. If T(n) denotes its adjacency matrix, then the above sequence is det(T(n))for n=4,5,6....42.at n=11A057980
• McKay-Thompson series of class 10E for Monster.at n=48A058101
• McKay-Thompson series of class 18j for the Monster group.at n=75A058548
• a(n+1) = a(n) - a(floor(n/2)), with a(0)=0, a(1)=1.at n=41A062187
• Partial sums of A073579.at n=22A077039
• Expansion of 1/(1+x-x^2-2*x^3).at n=23A077971
• a(n) = sigma(n) - 4*phi(n).at n=72A079546
• Triangular matrix, read by rows, equal to the matrix square of A102225, such that the first differences of row k forms row (k+1) of A102225.at n=16A102228
• Column 1 of triangular matrix A102228, in which the first differences of row k forms row (k+1) of its matrix square-root (A102225).at n=5A102229
• McKay-Thompson series of class 20C for the Monster group.at n=48A112159
• Sum(mu(i)*sigma(j): i+j=n), with mu=A008683 and sigma=A000203.at n=34A112964
• New tetradiagonal form matrix as triangular sequence from solution of : X(n,m)=Steinbach(n,m)^(-1).tri-Antidiagonal_1(n,n).at n=41A124020
• Riordan array ((1+3*x-sqrt(1+2*x+9*x^2))/(2*x),(1+3*x-sqrt(1+2*x+9*x^2))/2).at n=38A125694
• Expansion of q^(-1/3) * a(q) * b(q) * c(q) / 3 in powers of q where a(), b(), c() are cubic AGM theta functions.at n=36A130539
• McKay-Thompson series of class 10E for the Monster group with a(0) = 1.at n=48A132980
• McKay-Thompson series of class 10E for the Monster group with a(0) = 2.at n=48A138516