-2528

Appears in sequences

• Expansion of sin(tanh(sin(x))).at n=3A009520
• Sequence is {a(4,n)}, where a(m,n) is defined at sequence A110665.at n=24A110669
• Triangle read by rows of coefficients of Chebyshev-like polynomials P_{n,4}(x) with 0 omitted (exponents in increasing order).at n=42A136390
• a(n) = 2*a(n-1) - 10*a(n-2), with a(0) = 0, a(1) = 1.at n=10A190958
• Alternating sum of 10-gonal (or decagonal) pyramidal numbers.at n=15A269441
• a(n) = (-1)^n*(n + 1)*(5*n^2 + 10*n + 1).at n=7A271532
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 443", based on the 5-celled von Neumann neighborhood.at n=33A272228
• 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=41A347096