30548

Appears in sequences

• Numbers k such that sigma(k) = sigma(k+7).at n=23A015867
• a(n) = Sum_{j=0..floor(n/2)} T(n,j), T given by A026736.at n=15A026744
• a(n) = Sum_{i=0..n} T(i,n-i), array T as in A049723.at n=30A049724
• a(n) = A076969(n)^(1/3).at n=41A076970
• a(n) = (3^n-1)/2 + 2^n.at n=10A094374
• Unlabeled analog of A025168.at n=12A103446
• Numbers k such that 6*p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)*(k+5)*p(k+6)-1 and 6*p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)*(k+5)*p(k+6)+1 are twin primes with p(h) = h-th prime.at n=16A129313
• Number of (n+1) X 4 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively.at n=23A204646
• First differences of the binomial transform of the partition numbers (A000041).at n=12A218482
• Large-q series expansion for the exponential of the corner free energy of the square-lattice zero-temperature Potts antiferromagnet, in terms of the variable z = 1/(q - 1).at n=19A238836
• a(n) = 3*binomial(n,4) - 6*binomial(n,3) + 4*binomial(n,2) - 2.at n=26A335694