38989

Appears in sequences

• Strong pseudoprimes to base 20.at n=15A020246
• a(1)=1, a(2)=3, a(3)=8; for n>=4, a(n) = 10*a(n-3) + 8 (if a(n-3) is odd) or + 9 (if a(n-3) is even).at n=13A117713
• Positive solutions x to the equation x^2 + (x+71)^2 = y^2.at n=11A118673
• a(n) = prime(n)_prime(n).at n=43A122622
• Nearest integer to the space diagonal of the smallest (measured by the longest edge) primitive (gcd(a,b,c)=1) Euler bricks (a, b, c, sqrt(a^2 + b^2), sqrt(b^2 + c^2), sqrt(a^2 + c^2) are integers). If the space diagonal is an integer then the Euler brick is called a "perfect cuboid". There are no known perfect cuboids.at n=35A141029
• Least integer having a larger digital sum than the previous term and such that 10^(n-1) + a(n) is a prime.at n=17A199190
• Numbers n such that the n-th digit (after the decimal point) in the decimal expansion of Pi are the occurrence of the least significant digit represented by the more significant digits.at n=26A201545
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^3 < x^3 + y^3.at n=38A211650
• Number of (w,x,y) with all terms in {0,...,n} and max(w,x,y) >= 2*min(w,x,y).at n=36A213390
• a(n) is the least number k whose sum of digits in base 10 is n and that is palindromic in base n, or -1 if no such number exists.at n=34A375387