2684354560

Appears in sequences

• a(n) = 10*4^n.at n=14A002066
• a(n) = 5 * 2^n.at n=29A020714
• a(n) = (3*n-1) * 2^(n-2).at n=26A053220
• a(n) = (9*2^n + (-2)^n)/4 for n>0.at n=29A056486
• Expansion of g.f.: (1+x^2)/(1-2*x).at n=31A084215
• Numerators of the average length of a line segment picked at random in the unit n-ball for even n.at n=4A093532
• a(n) = 2^prime(n) + 2^prime(n+1).at n=9A137389
• Binomial transform of A010685.at n=30A146523
• Index of first multiple of n-th prime in A005179.at n=25A161177
• Number of binary strings of length n with equal numbers of 001 and 100 substrings.at n=32A164143
• Inverse binomial transform of A166517.at n=31A166577
• a(1) = 2, a(2) = 3; thereafter a(n) is the sum of all the previous terms.at n=31A257113
• Decimal equivalents of A268229.at n=29A268230
• Least k such that A006667(k)/A006577(k) = 1/n.at n=31A287798
• Numbers n such that phi(n) - 1 | sigma(n).at n=43A291880