51786

Appears in sequences

• Number of 5-tuples of different integers from [ 2,n ] with no global factor.at n=24A015641
• Least k such that first k terms of A022300 contain n more 2's than 1's.at n=33A025515
• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,25.at n=15A064249
• a(n) = A000203(n) * A024916(n).at n=33A143238
• Expansion of x*(1 -15*x +99*x^2 -373*x^3 +879*x^4 -1338*x^5 +1311*x^6 -804*x^7 +289*x^8 -44*x^9) / [(1-3*x+x^2) *(1-2*x)^6 *(1-x)^2].at n=9A211387
• a(n) = binary code (shown here in decimal) of the position of natural number n in the beanstalk-tree A218776.at n=41A218615
• a(n) = binary code (shown here in decimal) of the position of the predecessor of the natural number pair (2n,2n+1) in the compact beanstalk-tree A218780.at n=22A218791
• p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = 1 - S - S^2 - S^3.at n=15A292322