-219

Appears in sequences

• Expansion of Product_{k > 0} 1/(1 + x^prime(k)).at n=63A048165
• Expansion of (1-x-x^N)/((1-x)(1-x^2)(1-x^3)...(1-x^N)) for N = 4.at n=32A060023
• Coefficient array for certain numerator polynomials N5(n,x), n >= 0 (rising powers of x) used for quintinomials (also called pentanomials).at n=64A063422
• Sum_{d divides n} d^2*(-1)^bigomega(d), where bigomega(n) = A001222(n).at n=17A076792
• Expansion of (1-x)^(-1)/(1+2*x+2*x^3).at n=7A077927
• G.f.: Product_{m>=1} 1/(1+x^m)^A000009(m).at n=31A089254
• Riordan array (1/(1+2x), x/(1+x)).at n=39A103316
• Matrix inverse of triangle A107717, read by rows.at n=10A107726
• Matrix inverse of triangle A107717, read by rows.at n=50A107726
• Matrix inverse of triangle A107717, read by rows.at n=40A107726
• Matrix inverse of triangle A107717, read by rows.at n=31A107726
• Matrix inverse of triangle A107717, read by rows.at n=23A107726
• Matrix inverse of triangle A107717, read by rows.at n=16A107726
• Matrix inverse of A107719.at n=10A107727
• Diagonal sums of triangle A110324.at n=20A110326
• Inverse of a triangle of pyramidal numbers.at n=30A110814
• Triangle of coefficients of characteristic polynomials of asymmetrical tridiagonal matrices: Middle diagonal: a=1; Lower first subdiagonal: b=2; Upper first subdiagonal: c=1; Example: M(3) {{1, 1, 0}, {2, 1, 1}, {0, 2, 1}}.at n=57A136644
• Coefficient Expansion sequence of a Weaver Morse Code polynomial (using Cyclotomic prime base dot, dash, letter space and word space symbols): p(x) = -5 - 10 x - 12 x^2 - 10 x^3 - 7 x^4 - 3 x^5 + 5 x^7 + 8 x^8 + 9 x^9 + 8 x^10 + 6 x^11 + 3 x^12 + x^13.at n=16A143389
• Expansion of 1/(x^10*p(x + 1/x)), where p(x) = 1 - x^3 - x^5 - x^7 + x^10 is a Salem polynomial.at n=6A143471
• Triangle T(n,k) = 1 - A176337(k) - A176337(n-k) + A176337(n) read by rows.at n=12A176339