233 is the 13th number in a Fibonacci sequence {233 = 3 x 17} {17 is the 7th prime} 377 is the 14th number in a Fibonacci sequence {377 = 13 x 29} 609 is the sum of a Fibonacci sequence up to the 13th iteration {609 = 3 x 7 x 29} 986 is the sum of a Fibonacci sequence up to the 14th iteration {986 = 2 x 17 x 29} {17 is the 7th prime} 13 is the 6th prime number 41 is the 13th prime number {If 1 was considered a prime number, 13 would be the 7th prime and 41 would be the 14th prime.} 43 is the 14th prime number The sum of all prime numbers to 13 is 41, or 42 if 1 was still included {42 = 6 x 7} The sum of primes to 29 is 129 {129 = 3 x 43} 43=14th prime, or 130 if 1 was still included {130 = 13 x 10} The sum of primes up to 41 is 238 {238 = 2 x 7 x 17}, or 239 if 1 was still included {239 = 52nd prime, 52 = 4 x 13}
( William Struse )
[ The 13th Enumeration ]
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