-1272

Appears in sequences

• McKay-Thompson series of class 12E for the Monster group.at n=17A058483
• a(n) = prime(n)*(prime(n + 1) + 1) - (n^3 + sum of digits of n^3).at n=16A123139
• Expansion of 1 - (1/3) * b(q) * b(q^2) * c(q)^2 / c(q^2) in powers of q where b(), c() are cubic AGM functions.at n=39A132001
• McKay-Thompson series of class 12E for the Monster group with a(0) = -2.at n=34A187196
• McKay-Thompson series of class 12E for the Monster group with a(0) = 2.at n=34A187197
• Expansion of q / (chi(q) * chi(q^2) * chi(q^3) * chi(q^6))^2 in powers of q where chi() is a Ramanujan theta function.at n=21A212770
• Expansion of eta(q)^5 * eta(q^3) * eta(q^6)^4 / eta(q^2)^4 in powers of q.at n=39A214262
• Coefficients in q-expansion of E_4*E_6^3, where E_4 and E_6 are respectively the Eisenstein series A004009 and A013973.at n=1A282328
• G.f.: A(x,q) = sqrt( Q(x,q) / Q(x,-q) ), where Q(x,q) = Sum_{n=-oo..+oo} (x - q^n)^n.at n=186A292929
• Row 3 in rectangular array A292929.at n=15A294066
• a(1)=0; thereafter a(n) = (n-1)*sigma(n)-n*sigma(n-1) where sigma is the sum-of-divisors function A000203.at n=30A335153