24173

Appears in sequences

• a(1) = 2; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=41A025003
• Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 18.at n=59A050967
• Total number of positive integers below 10^n requiring 3 positive biquadrates in their representation as sum of biquadrates.at n=6A186651
• The number of tilings of a 9 X (2n) floor with 2 X 3 hexominoes.at n=14A236584
• Triangle read by rows, T(n,k) = Sum_{j=0..n-k+1} j!*C(n-1,j-1)*T(n-j,k-1) if k != 0 else 1, n>=0, 0<=k<=n.at n=30A256895
• Sequence is an irregular triangle read by rows with zeros removed where T(n,k) is the number of compositions of n whose standard factorization into Lyndon words has k distinct factors.at n=54A299072