36015

Appears in sequences

• Triangle of coefficients in expansion of (1+7x)^n.at n=25A013614
• Triangle of coefficients in expansion of (3+7x)^n.at n=19A013624
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j).at n=23A027466
• a(n) = 7^(n-2) * C(n,2).at n=4A027474
• Numbers k such that 75*2^k+1 is prime.at n=43A032387
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*3^j.at n=16A038269
• a(n) = Xpower(n,3).at n=35A048732
• a(n) = binomial(n-1,2)*n^(n-3).at n=6A053507
• Triangle read by rows: T(n, k) is the number of labeled trees on n nodes with maximal node degree k (0 < k < n).at n=23A061356
• Numbers whose digital sum is equal to the sum of primes from their smallest to largest prime factor.at n=20A076406
• Duplicate of A027474.at n=6A081137
• Triangle, read by rows, of coefficients for the third iteration of the hyperbinomial transform.at n=31A089463
• 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=10A098909
• Numbers k such that the ratio of A117731(k) and A082687(k) is composite.at n=3A126563
• Triangular array of the coefficients of the sequence of Abel polynomials A(n,x) := x*(x-n)^(n-1).at n=31A137452
• Triangle A061356 read right to left.at n=25A139526
• Triangle T(n,k), n>=0, 0<=k<=n, read by rows: T(n,k) = number of simple graphs on n labeled nodes with k edges where each maximally connected subgraph consists of a single node or has a unique cycle of length 3.at n=35A144207
• Numbers with exactly 3 distinct odd prime divisors {3,5,7}.at n=25A147576
• Number of (n+1)X6 0..3 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.at n=6A206340
• Number of (n+1)X8 0..3 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor.at n=4A206342