20749

Properties

Appears in sequences

• Generalized Fibonacci numbers.at n=6A015453
• Numbers k such that the continued fraction for sqrt(k) has period 35.at n=35A020374
• Sums of distinct powers of 12.at n=19A033048
• Sums of 7 distinct powers of 3.at n=39A038469
• Sums of 3 distinct powers of 12.at n=4A038493
• Primes p(x) satisfying the following conditions: (a) A082882(x)=1; (b) {p(x),p(x+1)} are not twin primes; (c) values of A075860(j) for j composites between these two non-twin primes are identical.at n=9A082883
• Numbers n such that f(n), f(n+1) and f(n+2) are prime, f(m)=72*m^2+7.at n=23A121089
• Primes of the form k^2 + 13.at n=26A138375
• Primes congruent to 40 mod 59.at n=36A142767
• Primes congruent to 9 mod 61.at n=40A142807
• Primes p that p//13 and p//31 are consecutive primes.at n=29A176601
• Primes that can be expressed as the sum of a Fibonacci number and the square of a Fibonacci number.at n=22A178991
• Primes of form a^2+b^2 such that a^4+b^4 and a^8+b^8 are primes.at n=17A182313
• Primes that are the sum of squares of three positive Fibonacci numbers.at n=30A191375
• Centered 28-gonal numbers.at n=38A195314
• Primes whose base-3 representation also is the base-2 representation of a prime.at n=34A235265
• Primes equal to the sum of both two and three successive semiprimes.at n=18A255897
• Centered 13-gonal (or tridecagonal) primes.at n=11A262493
• Primes of the form n^4 + n + 1 with n positive.at n=6A272571
• The n-th positive integer that has exactly n representations of the form 1 + p1 * (1 + p2* ... * (1 + p_j)...), where [p1, ..., p_j] is a (possibly empty) list of distinct primes.at n=10A317537