-265

Appears in sequences

• Related to Genocchi numbers.at n=4A002317
• Coefficients of modular function denoted G_6(tau) by Atkin.at n=16A005764
• a(n) = Sum_{i=n-6..n-1} (-1)^i * a(i), a(1)=1, a(2)=1, a(3)=1, a(4)=1, a(5)=1, a(6)=1.at n=70A051794
• a(n) = -(n + 1)*(2*n^2 + n - 12)/6.at n=9A058372
• a(n+1) = a(n) - a(floor(n/2)), with a(0)=0, a(1)=1.at n=43A062187
• Determinant of rank n matrix of 1..n^2 filled successively along antidiagonals.at n=22A069480
• Matrix inverse of triangle A063967.at n=32A091698
• Expansion of (1+x)^2/((1+x)^2+x^3).at n=13A099529
• Riordan array (((1+x)^2 - x^3)/(1+x)^3, 1/(1+x)).at n=68A099569
• Triangle read by rows: Characteristic polynomials of lower triangular Bell number matrix.at n=12A101908
• Matrix inverse square-root of triangle A105615.at n=51A105620
• McKay-Thompson series of class 40d for the Monster group.at n=51A112182
• Semiprime(n)*semiprime(n+3) - semiprime(n+1)*semiprime(n+2), where semiprime(n) is the n-th semiprime.at n=14A118780
• Expansion of (1-2x-5x^2-7x^3+x^6)/((1-x)(1-x^3)^2).at n=19A141352
• The real part of complex sequence: a(n) = a(n-1) + (1+i)*a(n-2).at n=12A143055
• Triangle t(n, k) = k*n*(prime(n+2) - 2*prime(n+1) + prime(n)) + prime(n), 0 <= k <= n = 1, 2, 3, ...at n=52A147815
• Coefficient triangle sequence of characteristic polynomials of a Fermat like matrix:M(n)=Eulerian n-th matrix: F(n)=M(n).Transpose[M(n)]].at n=13A168242
• First differences of A060819(n-4)*A060819(n).at n=18A185688
• Logarithmic derivative of the q-exponential of x, E_q(x,q), evaluated at q=-x.at n=18A198262
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 278", based on the 5-celled von Neumann neighborhood.at n=17A271098