-657

Appears in sequences

• Inverse Euler transform of {A001285(0), A001285(1), ...} where A001285(n) is Thue-Morse sequence.at n=34A029878
• Triangle of coefficients of numerators of powers of e^2 in Sum_{k>=1} {1 / (1 + (k+1/2)^2*Pi^2)^n} + {4^n / (4+Pi^2)^n}.at n=15A085471
• Alternating sum of 11-gonal (or hendecagonal) numbers.at n=17A266087
• Expansion of 1/(1 - x*Product_{k>=1} 1/(1 + x^k)).at n=40A299208
• a(n) is the smallest error in trying to solve n^4 = x^4 + y^4. That is, for each n from 2 on, find positive integers x and y, x <= y < n such that |n^4 - x^4 - y^4| is minimal and let a(n) = n^4 - x^4 - y^4.at n=8A308834