-1495

Appears in sequences

• Dirichlet convolution of [ 1,1,1,... ] with Ramanujan numbers (A000594).at n=3A034777
• Numerators of continued fraction for left factorial.at n=18A056889
• McKay-Thompson series of class 10c for Monster.at n=32A058204
• Consider the triangle in which the n-th row starts with n, contains n terms and the difference of successive terms is 1,2,3,... up to n-1. Sequence gives row sums.at n=22A081498
• a(n) = (a(n-1) * a(n-3) + (-1)^n * a(n-2)^2) / a(n-4), with a(0) = 0, a(1) = -1, a(2) = a(3) = a(4) = 1, a(9) = 3.at n=27A247369
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 81", based on the 5-celled von Neumann neighborhood.at n=21A270101
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 169", based on the 5-celled von Neumann neighborhood.at n=29A270464
• Expansion of Product_{k>=1} 1/(1+x^(2*k-1))^(2*k-1).at n=17A284628