19618

Appears in sequences

• Number of primes less than 10000n.at n=21A038813
• Integers n > 1 such that A130280(4n^2) < n, i.e., there is an m < n, m > 1 such that 4n^2(m^2 - 1) + 1 is a square.at n=19A130281
• a[n] = number of bit strings of length n which have exactly as many substrings 000 as substrings 111.at n=17A158422
• Number of (w,x,y) with all terms in {0,...,n} and even range.at n=33A212975
• Sum of the traces of all plane partitions of n.at n=13A276432
• Solutions x to the negative Pell equation y^2 = 72*x^2 - 83232 with x,y >= 0.at n=12A281239
• a(n) is the least k such that A295520(k) = n.at n=47A295793
• The smallest number in base n such that two digits (and no fewer) need to be changed to get a prime.at n=32A370531