73681

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 8x + 3.at n=19A023292
• Primes with property that when cubed all even digits occur together and all odd digits occur together.at n=36A030482
• "STIRLING" transform of squares A000290.at n=8A033452
• Primes of the form (k+1)*prime(k) + k*prime(k+1).at n=29A097241
• Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} in which the last block is the singleton {k}, 1<=k<=n; the blocks are ordered with increasing least elements.at n=63A108458
• Triangle read by rows: matrix product of the binomial coefficients with the Stirling numbers of the second kind.at n=43A126350
• Triangle read by rows: A008277 * A007318.at n=37A137597
• E.g.f. sec(x)/(1-x) = 1/( cos(x) * (1-x) ).at n=8A159039
• Triangle by rows, A033452 convolved with A000079.at n=35A180338
• a(n) = (9*2^n - 6*n - 10)/2.at n=13A308579
• a(n) is the least prime p such that p+prime(n) has exactly n prime factors, counted with multiplicity.at n=14A332860
• Prime numbersat n=7276