23189

Properties

Appears in sequences

• a(n) = ceiling(n*phi^15), where phi is the golden ratio, A001622.at n=17A004970
• Primes p whose period of reciprocal equals (p-1)/11.at n=8A056216
• Prime mean of 8 horizontal, vertical and main diagonal sums associated with primes in A094454.at n=27A094455
• Duplicate of A056216.at n=8A098678
• a(n+3) = a(n+2) + 3a(n+1) - 2a(n); a(0) = 1, a(1) = -1, a(2)= 3.at n=17A104005
• Number of partitions of n having exactly one part with multiplicity 3.at n=44A118808
• Smallest prime p such that p divides m^(m+1)+1, where m = (p-2n-1)/(2n).at n=33A123571
• Primes congruent to 5 (mod 504).at n=18A228093
• Number of n X 3 0..2 arrays with top left element 0, horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and antidiagonal differences never 0.at n=7A229397
• T(n,k)=Number of nXk 0..2 arrays with top left element 0, horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and antidiagonal differences never 0.at n=47A229402
• The 360 degree spoke (or ray) of a hexagonal spiral of Ulam.at n=44A244803
• Smallest of five consecutive primes in arithmetic progression with common difference 90 and equal digit sums.at n=20A253232
• a(n) = 24*n^2 + 52*n + 29.at n=30A258721
• Primes whose base-8 representation is a perfect square in base 10.at n=9A267490
• Primes p such that Sum_{k=primes<p} (k mod p) and Sum_{k=primes<p} (p mod k) are both prime.at n=12A274025
• First of three consecutive primes p,q,r such that r^2-p^2+p, r^2-p^2+q and r^2-p^2+r are consecutive primes.at n=30A347531
• Primes p such that p + 8, p + 12 and p + 20 are also primes.at n=30A384299
• Prime numbersat n=2587