-208

Appears in sequences

• a(n) = Sum_{d|n, d == 1 mod 4} d^2 - Sum_{d|n, d == 3 mod 4} d^2.at n=29A002173
• a(n) = Sum_{d|n, d == 1 mod 4} d^2 - Sum_{d|n, d == 3 mod 4} d^2.at n=14A002173
• Coefficients of a Dirichlet series.at n=27A002558
• E.g.f. tanh(sin(x)*sin(x)) (even powers only).at n=3A009801
• Expansion of e.g.f. arctan(sin(x)*sin(x)), even powers only.at n=2A012297
• Duplicate of A009801.at n=2A012300
• sin(exp(x)-cos(x))=x+2/2!*x^2-12/4!*x^4-68/5!*x^5-208/6!*x^6...at n=5A013310
• Expansion of square root of q times normalized Hauptmodul for Gamma(4) in powers of q^8.at n=74A029838
• Inverse binomial transform of Thue-Morse sequence A001285.at n=11A029880
• a(n) = a(n-1) - a(n-3) with a(1)=0, a(2)=0, a(3)=1.at n=42A050935
• (1/18)*Difference between concatenation of n and n^2 and concatenation of n^2 and n.at n=12A055435
• McKay-Thompson series of class 24C for Monster.at n=43A058573
• McKay-Thompson series of class 24d for Monster.at n=49A058587
• Expansion of (1-x-x^N)/((1-x)(1-x^2)(1-x^3)...(1-x^N)) for N = 3.at n=51A060022
• McKay-Thompson series of class 18D for the Monster group.at n=63A062242
• Alternating sum sigma(1)-sigma(2)+sigma(3)-sigma(4)+...+((-1)^(n+1))*sigma(n).at n=29A068762
• Determinant of the n X n matrix whose element (i,j) equals |i-j| (mod 4).at n=5A071769
• Expansion of x/B(x) where B(x) is the g.f. for A002487.at n=58A073469
• a(n) = A077110(n) - n^2.at n=44A077111
• Expansion of 1/(1-x+2*x^2-x^3) in powers of x.at n=20A077954