125664

Appears in sequences

• a(n) = Sum_{k=2..n} n(n-1)...(n-k+1)/k.at n=8A006231
• Positive numbers k such that k and 2*k are anagrams in base 7 (written in base 7).at n=20A023068
• Number of conics which pass through 3 points and are bitangent to a general curve of order n.at n=22A060783
• Square roots of A069191, sorted.at n=34A070223
• Sum of the first n weird numbers.at n=14A125114
• Triangle read by rows: T(n,k) is the number of permutations of an n-set having k cycles of size > 1 (0<=k<=floor(n/2)).at n=26A136394
• The 3rd Witt transform of A000027.at n=34A147611
• Number of (n+1)X3 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.at n=1A185573
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.at n=4A185575
• Numbers with prime factorization pqrst^5.at n=15A190383
• Number of nX3 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.at n=2A222951
• T(n,k)=Number of nXk 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.at n=12A222953
• 3-loop graph coloring a rectangular array: number of n X 1 0..6 arrays where 0..6 label nodes of a graph with edges 0,1 1,2 2,0 0,3 3,4 4,0 0,5 5,6 6,0 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph.at n=9A223240
• Square root of the absolute value of A069191(n).at n=45A228552
• Determinant of the n X n matrix with (i,j)-entry equal to 1 or 0 according as 2*(i + j) - 1 is prime or not.at n=22A228616
• Growth series for group with presentation < S, T : S^2 = T^3 = (S*T)^11 = 1 >.at n=33A299252
• a(n) = Sum_{k=0..floor(n/3)} n^k * |Stirling1(n,3*k)|.at n=8A356361
• a(n) is the least number with exactly n divisors of the form 5*k+2.at n=28A364598
• Triangle read by rows: T(n,k) = binomial(n+1,k+1) * binomial(5*n-4*k+1,k) / (n+1), 0<=k<=n.at n=48A391048