41549

Properties

Appears in sequences

• Numerators of sequence {b(1), b(2), ...} which when COMPOSED with itself gives {1,2,3,...}.at n=14A030274
• Number of subsets T of S={0,1,2,...,n-1} such that the closure of T under addition modulo n is S.at n=15A196021
• First primes beginning a chain of 4 primes indexed equidistantly (n-th, (n+b)-th, (n+2b)-th, (n+3b)-th primes) whose sum of squares is the square of two times a prime and with b <= n.at n=30A214265
• Primes p=prime(i) of level (1,4), i.e., such that A118534(i) = prime(i-4).at n=14A216177
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 195", based on the 5-celled von Neumann neighborhood.at n=40A270691
• Primes p congruent to 1 modulo 13 such that x^13 = 2 has a solution modulo p.at n=23A275773
• a(n) is the largest prime p congruent to 1 mod n such that the multiplicative subgroup H of (Z/pZ)* of index n contains no nontrivial mod-p arithmetic progression of length 3.at n=45A298565
• E.g.f.: (1 + x) * exp(x) / (sec(x) + tan(x)).at n=11A337443
• Triangle read by rows: T(n,k) = Sum_{j=k..n} binomial(n + j, n)*binomial(n, j)/(j + 1).at n=38A351385
• Number of partitions of n in which exactly one odd part is repeated and even parts are unrestricted.at n=44A353903
• Prime numbersat n=4346