471040

Appears in sequences

• Expansion of (1-x)/(1-2*x+2*x^2-2*x^3).at n=33A078003
• Expansion of x/(1 - 4*x^2 - 4*x^3).at n=17A099462
• (1,3)-entry of the 3 X 3 matrix M^n, where M = {{0, -1, 1}, {1, 1, 0}, {0, 1, 1}}.at n=34A122788
• Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have a' * b' = k, where a' and b' are the arithmetic derivatives of a and b.at n=23A259675
• a(n) = A000196(A277699(A277807(n))).at n=29A277806