22861

Properties

Appears in sequences

• Quintan primes: p = (x^5 - y^5)/(x - y).at n=14A002649
• Primes that are palindromic in base 2 (but written here in base 10).at n=39A016041
• Expansion of g.f. 1/((1-4*x)*(1-11*x)).at n=4A016158
• Primes that remain prime through 4 iterations of function f(x) = 10x + 9.at n=11A023329
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 15.at n=17A031603
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 84 ones.at n=24A031852
• Primes associated with groups in A076077.at n=32A076076
• Ratio-determined insertion sequence I(0.26688) (see the link below).at n=7A085349
• Small-number statistic from the enumeration of domino tilings of a 9-pillow of order n.at n=16A112844
• Largest prime < 10*a(n-1), a(1)=23.at n=3A124336
• Prime numbers p such that p^3 - p + 1 and p^3 + p - 1 are both primes.at n=28A137463
• Prime numbers 3*n-2 such that n, 2*n-1 and 3*n-2 are prime.at n=33A180025
• Prime numbers that in binary are palindromic and also have palindromic index.at n=6A211405
• Binary palindromes (cf. A006995) such that the number of contiguous palindromic bit patterns is minimal (for a given number of places).at n=35A217099
• Base-10 representation of 0 and the primes at A262627.at n=3A262628
• Prime numbersat n=2553