28403

Properties

Appears in sequences

• Primes that remain prime through 3 iterations of function f(x) = 8x + 9.at n=12A023295
• Primes from merging of 5 successive digits in decimal expansion of (Pi^2).at n=13A104928
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n having k UU's starting at level 0 (i.e., doublerises at level 1; n >= 0, 0 <= k <= floor(n/2)).at n=26A129168
• Primes p such that the multiplicative order of 2 modulo p is (p-1)/11.at n=10A152311
• Lesser of two consecutive primes, p < q, such that both p*q+p-q and p*q-p+q are prime numbers.at n=35A154553
• Lesser of two consecutive primes, p < q, such that p*q + p - q and p*q - p + q are also consecutive primes.at n=16A225726
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 605", based on the 5-celled von Neumann neighborhood.at n=29A273177
• Number of inversion sequences of length n avoiding the consecutive patterns 010, 021, and 120.at n=9A328432
• Discriminants of imaginary quadratic fields with class number 29 (negated).at n=37A351667
• Prime numbersat n=3090