26894

Appears in sequences

• Expansion of (1+x)/(1-x-4*x^2).at n=11A026597
• A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to the ratios of 8 musical tones: 8/7 16/11 5/4 4/3 3/2 8/5 11/8 7/4.at n=45A060527
• Equal divisions of the octave of decreasing eleven-limit Pepper ambiguity.at n=13A117557
• Number of binary strings of length n with no substrings equal to 0000, 0111 or 1110.at n=18A164443
• Numbers n such that max(tau(n),tau(n+1),tau(n+2))- min(tau(n),tau(n+1),tau(n+2)) = 1.at n=14A173149
• G.f.: Product_{n>0} ( (1+x^n)/(1-x^n) )^(n^2).at n=9A206622
• Numbers k such that k and k+1 are the product of exactly four distinct primes.at n=27A318896
• Expansion of Product_{k>=1} 1/(1 - (k - 1)*x^k).at n=22A319110