215040

Appears in sequences

• Denominators of coefficients in Taylor series expansion of log(1+x)^2/sqrt(1+x).at n=8A002552
• Theta series of laminated lattice LAMBDA_11^{max}.at n=9A006911
• a(n) = (2*n+6)!!/6!!, related to A000165 (even double factorials).at n=5A051580
• Denominators of Sum_{k=1..n} 1/(k * 2^k).at n=7A068565
• 14-almost primes (generalization of semiprimes).at n=29A069275
• Number of pairs of complex Golay sequences of length n.at n=19A072128
• Triangle T(n,k) of numbers of connected (unicyclic) graphs with unique cycle of length k (3<=k<=n), on n labeled nodes.at n=17A098909
• Matrix log of triangle A078536, which shifts columns left and up under matrix 4th power; these terms are the result of multiplying each element in row n and column k by (n-k)!.at n=40A111818
• Sum of divisors of 2^n + 3^n.at n=10A114705
• Number of 3 X 3 symmetric matrices over Z(n) having nonzero determinant.at n=7A115225
• Number of n X n real symmetric (+1,-1)-matrices having maximal determinant (=A119003(n)).at n=7A119005
• Triangle read by rows: T(n,k) = n!*2^k/(n-k)! (n >= 0, 0 <= k <= n).at n=41A161381
• Numbers which are the area of exactly three Pythagorean triangles.at n=22A177021
• Where records occur in A222084.at n=26A222089
• Numbers n such that there are three distinct triples (k, k+n, k+2n) of squares.at n=10A222154
• Triangular array read by rows. T(n,k) is the number of cycles in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n} that have length k; 1<=k<=n.at n=33A225213
• Number of 5-colorings of the strong product of the complete graph K2 and the cycle graph Cn.at n=5A229031
• Polynomials for total Pontryagin classes. Refinement of double Pochhammer triangle.at n=47A231846
• Number T(n,k) of endofunctions on [n] where the largest cycle length equals k; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=42A241981
• Number of endofunctions on [n] where the largest cycle length equals 6.at n=2A246216