16843009

Appears in sequences

• Sierpiński's triangle (Pascal's triangle mod 2) converted to decimal.at n=24A001317
• Numerators of coefficients for central differences M_{4}^(2*n).at n=15A002675
• Numerators of the Taylor coefficients of (e^x-1)^2.at n=31A002678
• Divisors of 2^32 - 1 (for a(1) to a(31), the 31 regular polygons with an odd number of sides constructible with ruler and compass).at n=24A004729
• Smallest number m such that the trajectory of m under iteration of Euler's totient function phi(n) [A000010] contains exactly n distinct numbers, including m and the fixed point.at n=25A007755
• a(n) = sigma_8(n), the sum of the 8th powers of the divisors of n.at n=7A013956
• Numerator of sum of -8th powers of divisors of n.at n=7A017679
• a(n) = sigma_n(n): sum of n-th powers of divisors of n.at n=7A023887
• Numbers k such that k^3 is palindromic in base 16.at n=16A029735
• Sum of n-th powers of divisors of 8.at n=8A034496
• One-dimensional cellular automaton 'sigma-minus' (Rule 90): 000,001,010,011,100,101,110,111 -> 0,1,0,1,1,0,1,0.at n=12A038183
• Numbers whose base-16 representation has exactly 7 runs.at n=0A043680
• Odd values of n for which a regular n-gon can be constructed by compass and straightedge.at n=23A045544
• Smallest number whose Euler totient is divisible by 2^n.at n=24A053576
• a(n) = n^6 + n^4 + n^2 + 1.at n=16A059830
• Basis for code in A075928.at n=18A075929
• Numbers of the form (4^{mr}-1)/(4^r-1) for positive integers m, r.at n=32A076275
• Expansion of 1/((1-4*x)*(1-x^4)).at n=12A083589
• Smallest base-2 Fermat pseudoprime x that has ord(2,x) = n, or 0 if one does not exist.at n=31A086250
• a(n)=2*(4^n-1)/denominator(B(2n)) where B(k) denotes the k-th Bernoulli number.at n=16A090648