-99
domain: Z
Appears in sequences
- Expansion of Product_{k>=1} (1 - x^k)^12.at n=4A000735
- a(0) = 1, a(1) = 0, a(2) = -1; for n >= 3, a(n) = - a(n-2) + Sum_{ primes p with 3 <= p <= n} a(n-p).at n=33A002121
- Percolation series for hexagonal lattice.at n=11A006803
- Expansion of Product_{k>=1} (1 - x^k)^9.at n=7A010817
- Expansion of Product_{m>=1} ((1+q^(2*m-1))/(1+q^(2*m)))^3.at n=15A029840
- Inverse Euler transform of primes.at n=19A030010
- Expansion of (eta(q) * eta(q^9))^12 in powers of q.at n=4A034436
- Product_{k>=1} (1 + x^k)^a(k) = 1 + 2x.at n=9A038067
- Column 1 of Inverse partition triangle A038498.at n=55A039800
- Column 1 of Inverse partition triangle A038498.at n=54A039800
- Expansion of Product_{k > 0} 1/(1 + x^prime(k)).at n=53A048165
- Triangle: Matrix inverse of A047996.at n=69A052311
- a(n) = Sum_{d|2n+1} phi(d)*mu(d).at n=50A054586
- n - reversal of base 4 digits of n (written in base 10).at n=78A055949
- n - reversal of base 12 digits of n (written in base 10).at n=22A055963
- n - reversal of base 12 digits of n (written in base 10).at n=35A055963
- Numbers k such that 36*k^2 + 12*k + 5 is prime (sorted by absolute values with negatives before positives).at n=52A056907
- McKay-Thompson series of class 30c for Monster.at n=46A058624
- n-th prime minus its reversal.at n=47A068396
- Alternating sum sigma(1)-sigma(2)+sigma(3)-sigma(4)+...+((-1)^(n+1))*sigma(n).at n=19A068762