25900
domain: N
Appears in sequences
- Numbers k such that 265*2^k + 1 is prime.at n=24A053349
- Nearest k to j such that k*(2^j-1)+1 is prime where j=A000043(n) and 2^j-1 = Mersenne-prime(n) = A000668(n). If there are two k values equidistant from j, each of which produces a prime, the larger of the two gets added to the sequence.at n=24A159585
- The Wiener index of the P_3 X P_n grid, where P_m is the path graph on m nodes. The Wiener index of a connected graph is the sum of distances between all unordered pairs of nodes in the graph.at n=24A180569
- Number of subsets of {1,2,...,n-8} without differences equal to 2, 4, 6 or 8.at n=41A224811
- Number of tilings of a 5 X 2n rectangle using 2n pentominoes of shapes N, Y.at n=8A248102
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 577", based on the 5-celled von Neumann neighborhood.at n=30A273024
- Product_{d|n, A007431(d) > 0} prime(A007431(d)), where A007431 is the Möbius transform of Euler's totient function.at n=44A318838