-1216

Appears in sequences

• Expansion of e.g.f.: log(1+tan(x)*cosh(x)).at n=6A009375
• McKay-Thompson series of class 20D for Monster.at n=31A058553
• Resultant of the polynomial x^n-1 and the Hermite polynomial H_n(x).at n=2A085638
• Matrix square of inverse triangle A096651; transforms n-dimensional partitions into (n-2)-dimensional partitions.at n=59A096875
• A Chebyshev transform of Padovan numbers.at n=37A099491
• Riordan array (1/(1+x), x(1-x)/(1+x)^2).at n=51A110511
• Triangle read by rows: T(r,c)=T(r,c-1)+T(r,c+1)+T(r-1,c-1).at n=72A129394
• Table, read by rows, of coefficients of characteristic polynomials of almost prime matrices.at n=30A131175
• Triangle read by rows of coefficients of Chebyshev-like polynomials P_{n,6}(x) with 0 omitted (exponents in increasing order).at n=41A136398
• a(n) = (n+1)*(9-9*n+5*n^2-n^3).at n=7A157371
• Alternating sum of heptagonal numbers.at n=31A266085
• Determinant of n X n matrix whose elements are m(i,j) = prime(i+j)-prime(i).at n=6A298903
• a(1) = 1; a(n+1) = a(n) +- (sum of digits of a(1) up to a(n)), with "+" when a(n) is odd, or "-" if even.at n=30A332058
• a(1) = 1; a(n) = -Sum_{d|n, d < n} A341512(n/d) * a(d), where A341512(n) = sigma(n)*A003961(n) - n*sigma(A003961(n)).at n=31A347096
• Expansion of e.g.f. cos(x)*exp(x^2/2) = Sum_{n>=0} a(n)*x^(2*n)/(2*n)!.at n=5A362718
• a(n) is the numerator of the real part of 1/(1+i/2)^n, where i is the imaginary unit.at n=5A370191
• a(n) = Sum_{k=0..n} (-1)^k*A001595(k)^2.at n=7A375501