-260

Appears in sequences

• a(n) = Sum_{t=0..n} g(t)*g(n-t) where g(t) = A002121(t).at n=27A002122
• Expansion of Product (1 - x^k)^10 in powers of x.at n=7A010818
• Discriminants of quadratic number fields Q(sqrt -n) for n squarefree.at n=39A033197
• McKay-Thompson series of class 15D for the Monster group.at n=47A058511
• McKay-Thompson series of class 22B for Monster.at n=25A058568
• McKay-Thompson series of class 24D for the Monster group.at n=54A058574
• McKay-Thompson series of class 40b for Monster.at n=43A058666
• McKay-Thompson series of class 46A for the Monster group.at n=61A058688
• Row 9 of array in A288580.at n=13A092974
• Expansion of eta(q^2) * eta(q^30) / (eta(q^3) * eta(q^5)) in powers of q.at n=70A094022
• Inverse image of primes 2,3,5,7,... under the map Q defined in A095172.at n=55A095174
• Triangle of coefficients, read by row polynomials P_n(y), that satisfy the g.f.: A038497(x,y) = Product_{n>=1} 1/(1-x^n)^[P_n(y)/n], with P_n(0)=0 for n>=1 and P_0(0)=1.at n=29A096797
• Triangle T read by rows: inverse of fibonomial triangle (A010048).at n=31A103910
• An alternating sum of greatest common divisors.at n=67A106475
• a(n+4) = a(n+1) - a(n), a(0) = 1, a(1) = -4, a(2) = 0, a(3) = 1.at n=29A110064
• McKay-Thompson series of class 18i for the Monster group.at n=28A112157
• McKay-Thompson series of class 24h for the Monster group.at n=54A112165
• Expansion of psi(x)^5 / psi(x^5) - 25*x^2 * psi(x) * psi(x^5)^3 in powers of x where psi() is a Ramanujan theta function.at n=53A113259
• Triangle T(n,k) read by rows: consider the sequence a(m) = a(m-1) + sum_{0<j<=m/n} a(m-j*n) with a(0)=1. Row n of T(n,k) is formed by the coefficients of the recurrence relation of sequence b(i) = a(n*i).at n=24A113445
• Triangle, read by rows, equal to the matrix inverse of Q=A113381.at n=17A114158