19011

Appears in sequences

• Numbers whose set of base-11 digits is {1,3}.at n=43A032918
• Numbers k such that if P = 10*k^2+1, then P, P+6, P+12 and P+18 are all primes.at n=40A092446
• Numbers k with property that 19*k + {2,4,8,10} are two pairs of consecutive twin primes.at n=7A152926
• a(n) = (p*(p+4)+1)/2 where (p,p+4) are the n-th cousin prime pair.at n=13A163634
• Number of nondecreasing arrangements of 6 numbers x(i) in -(n+4)..(n+4) with the sum of sign(x(i))*2^|x(i)| zero.at n=37A187990
• Number of -n..n arrays x(0..4) of 5 elements with zero sum, and adjacent elements not both strictly positive and not both strictly negative.at n=9A199900
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A185957; by antidiagonals.at n=24A202678
• The number of labeled graphs of n vertices that have endpoints, where an endpoint is a vertex with degree 1.at n=5A245797
• Number of partitions of 8 copies of n into distinct parts.at n=10A258286
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 253", based on the 5-celled von Neumann neighborhood.at n=30A271052
• 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 419", based on the 5-celled von Neumann neighborhood.at n=14A282072
• Period of the continued fraction for sqrt(5^(2n+1)).at n=6A293028
• Number of compositions (ordered partitions) of n into at most 6 squarefree parts.at n=27A347783