19560

Appears in sequences

• Number of paths in Moebius ladder M_n.at n=8A020874
• Numerators of continued fraction convergents to sqrt(461).at n=7A041878
• McKay-Thompson series of class 39A for Monster.at n=50A058659
• Numbers n such that 6*10^n + 7*R_n - 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=7A103042
• Numbers such that all subsets of {prime(a(1)), ..., prime(a(n))} have a different sum.at n=17A138856
• a(n) = 49*n^2 - 2*n.at n=19A157362
• Numbers k such that, taken together, the base-10 and base-b expansions of k are pandigital for some b < 10.at n=6A174596
• Eventual period of a single cell in rule 110 cellular automaton in a cyclic universe of width n.at n=59A180001
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and (sum of terms) = n + 3.at n=44A210375
• Principal diagonal of the convolution array A213825.at n=14A213826
• Number of (n+1) X (3+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=6A235012
• Number of (n+1) X (7+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=2A235016
• T(n,k) is the number of (n+1) X (k+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=38A235017
• Number of nX2 0..3 arrays with no element equal to the sum of elements to its left or the sum of elements above it or the sum of the elements diagonally to its northwest, modulo 4.at n=6A239420
• T(n,k)=Number of nXk 0..3 arrays with no element equal to the sum of elements to its left or the sum of the elements above it or the sum of the elements diagonally to its northwest, modulo 4.at n=29A239424
• T(n,k)=Number of nXk 0..3 arrays with no element equal to the sum of elements to its left or the sum of the elements above it or the sum of the elements diagonally to its northwest, modulo 4.at n=34A239424
• Numbers k such that sigma(k) divides Fibonacci(k).at n=39A258748
• Numbers k such that k divides the sum of the first k primes with even indices.at n=19A263546
• Number of permutations of [n] with eight ordered cycles such that equal-sized cycles are ordered with increasing least elements.at n=2A285859
• Number of compositions (ordered partitions) of n into nonprime squarefree parts (A000469).at n=37A290137