28472

Appears in sequences

• All 81 combinations of prefixing and following a(n) by a single digit are nonprime.at n=14A032734
• Composite numbers k such that all the decimal concatenations ik and ikj (i, j = 1...9) are also composite.at n=8A032737
• Number of partitions of triangular numbers n*(n+1)/2 into (n-2) distinct parts for n>=3.at n=17A104384
• Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths starting at each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 9, n >= 2.at n=33A214042
• Number of n X 2 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-1) and new values introduced in order 0..2.at n=9A275260
• Numbers k where there are 8 primes between 10*k and 10*k + 30.at n=2A282059
• E.g.f. A(x) satisfies A(x) = exp( 2 * x * A(x)^(1/2) * exp(x * A(x)^(1/2)) ).at n=5A380425