81920

Appears in sequences

• Expansion of (1+x)/(1-4*x).at n=8A003947
• a(n) = Product_{i=0..7} floor((n+i)/8).at n=33A009694
• a(n) = 5 * 2^n.at n=14A020714
• Numbers of form 4^i*5^j, with i, j >= 0.at n=37A025617
• Expansion of (1 + 2x + 6x^2 + x^3)/(1 - 2x^2).at n=31A029745
• Numbers of the form 2^k times 1, 3 or 5.at n=46A029747
• Numbers of the form 2^k times 1, 5 or 7.at n=45A029749
• Triangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*8^j.at n=24A038214
• Triangle whose (n, k)-th entry is binomial(n, k)*4^(n - k)*4^k.at n=24A038234
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*8^j.at n=18A038238
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*8^j.at n=19A038238
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*2^j.at n=24A038280
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*4^j.at n=17A038282
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*4^j.at n=16A038282
• Sums of 2 distinct powers of 4.at n=35A038470
• Numbers k such that neither 4 nor 9 divides binomial(2k-1,k) (almost certainly finite).at n=29A051404
• Numbers n such that n+cototient(n) is a power of 2.at n=27A053159
• Nonprimes n such that n+cototient(n) is a power of 2.at n=22A053162
• Numbers of the form 2^i*5^j where i+j is odd.at n=35A054774
• Sums of two powers of 4.at n=43A055236