19092

Appears in sequences

• Coordination sequence for 4-dimensional RR-centered di-isohexagonal orthogonal lattice.at n=12A008528
• Perimeters of more than one primitive Pythagorean triangle.at n=34A024408
• Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 92.at n=29A031590
• Floor[ X/Y], where X = concatenation of the primes and Y = concatenation of natural numbers.at n=7A067101
• a(n) = T(n) concatenated with reverse(T(n)) divided by 11, where T(n) is the n-th triangular number.at n=20A084008
• Number of 4-indecomposable (connected) graphs on n nodes.at n=21A128526
• a(1) = 1; a(n+1) = Sum_{k=1..n} (a(k)-th integer from among those positive integers which are coprime to (n+1-k)).at n=13A130802
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.at n=9A148873
• 3 times 9-gonal (or nonagonal) numbers: a(n) = 3*n*(7*n-5)/2.at n=43A152759
• Ratio A191650(n+1)/A191650(n).at n=25A191651
• Number of n-bead necklaces labeled with numbers 1..3 allowing reversal, with no adjacent beads differing by more than 1.at n=14A208716
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 405", based on the 5-celled von Neumann neighborhood.at n=30A271814
• Number of 3 X n 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.at n=8A275566
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 563", based on the 5-celled von Neumann neighborhood.at n=14A283047
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 809", based on the 5-celled von Neumann neighborhood.at n=14A284178
• Number of lattices on n unlabeled nodes, up to duality.at n=11A373922