23496

Appears in sequences

• Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,13.at n=11A064243
• Numbers occurring twice in A068627.at n=22A068628
• a(n) is the square of the n-th partial sum minus the n-th partial sum of the squares, divided by a(n-1), for all n>=1, starting with a(0)=1, a(1)=4.at n=13A087957
• Column 0 of triangle A118032, where column 0 of the matrix square of A118032 forms a bisection of this sequence.at n=22A118033
• Column 0 of triangle A118040, which is the matrix square of triangle A118032; also equals a bisection of A118033, which is column 0 of A118032.at n=11A118041
• Number of ways to arrange 5 nonattacking knights on the lower triangle of an n X n board.at n=6A194489
• T(n,k)=Number of ways to arrange k nonattacking knights on the lower triangle of an n X n board.at n=61A194492
• Numbers k that divide sigma(k) + sigma(k-1).at n=18A227306
• G.f. A(x) satisfies: A(x)^4 = A(x^2)^2 + 8*x.at n=7A228711
• Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 6.at n=13A242504
• a(n) = fibonorial(3*n)/(fibonorial(2*n+1)*fibonorial(n+1)), where fibonorial(n) = A003266(n).at n=3A271421
• Indices of records in A371921: numbers k such that A371921(k) > A371921(m) for all m < k.at n=13A371922
• Number of finite regions in a complete bipartite graph where the vertices in the two parts are placed on opposite sides of a parabola at integer y coordinates y = 1, 2, ...n.at n=17A392443