24340

Appears in sequences

• a(1) = 3; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=41A025004
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 78.at n=3A031756
• a(n) = n!*sum( i+j<=n, 1/i!/j! ) for 0 <= i <= j < n.at n=7A076176
• Structured octagonal anti-prism numbers.at n=19A100184
• G.f.: A(x) = 1/(1 - x*B(x^2)), where B(x) = Sum_{n>=0} a(n)^2*x^n is the g.f. of A121648.at n=19A121649
• A bisection of A121649; a(n) = A121649(2*n+1) = A121648(2*n+1)^(1/2).at n=9A121651
• a(1)=1, a(n) = a(n-1) + n^4 if n odd, a(n) = a(n-1) + n^1 if n is even.at n=10A140158
• a(n) = 16*n^2 + 4.at n=38A158444
• Numbers n with property that n^2 is a sum of some 70 successive primes.at n=34A166256
• Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).at n=7A234263
• Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.at n=2A237386
• Number of (n+1)X(3+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.at n=1A237387
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.at n=7A237391
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.at n=8A237391
• Absolute discriminants of complex quadratic fields with 3-class group of elementary abelian type (3,3) of rank 2.at n=22A242863
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and Hilbert 3-class field tower of exact length 2.at n=9A242864
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and 3-principalization type (4224).at n=4A247690
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) whose second 3-class group is located on the sporadic part of the coclass graph G(3,2) outside of coclass trees.at n=13A247691