28123

Properties

Appears in sequences

• Smallest nonempty set S containing prime divisors of 5k+8 for each k in S.at n=27A020600
• State of one-dimensional cellular automaton 'sigma' (Rule 150): 000,001,010,011,100,101,110,111 -> 0,1,1,0,1,0,0,1 at generation n, converted to a decimal number.at n=7A038184
• Family 1 "Rule 90 x Rule 150 Array" read by antidiagonals.at n=35A048710
• Main diagonal of A048723, a(n) = Xpower(n,n).at n=7A048731
• Number of conjugacy classes in the symmetric group S_n with distinct cardinality.at n=46A073906
• a(n) is the n-th prime whose decimal expansion begins with the decimal expansion of n.at n=27A077345
• Positive integer values of n such that 6*n^2-5 is a square.at n=9A080806
• a(n)*a(n+3) - a(n+1)*a(n+2) = 5, given a(0)=a(1)=1, a(2)=3.at n=10A080874
• Primes p such that p-3 and p+3 are divisible by a cube.at n=26A089201
• XOR binomial transform of A099885.at n=14A099886
• Primes p such that p + googol is prime.at n=21A108250
• Primes p such that q-p = 28, where q is the next prime after p.at n=24A124595
• a(1)=1, a(n) = a(n-1) + sum of odd numbers which are among the first (n-1) terms of the sequence.at n=14A131093
• Starting from the standard 12 against 12 starting position in checkers, the sequence gives the number of distinct positions that can arise after n moves.at n=7A133047
• Prime numbers p such that p^3 - (p-1)^2 and p^3 + (p-1)^2 are also primes.at n=31A137474
• a(n) = 10*a(n-1) - a(n-2) for n >= 2 with a(0) = 1 and a(1) = 3.at n=5A140780
• a(n) is the smallest prime p beginning with 2n such that the difference between p and the next prime is 2n.at n=13A162357
• Primes p such that the concatenation of p and 29 is a square number: "p 29" = N = m^2.at n=25A168545
• Floor-Sqrt transform of (signless) central Stirling numbers of the first kind (A187646).at n=7A192662
• Primes of the form 5n^2 - 2.at n=9A201784