id:A104247 - OEIS Search Results

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Primes that are the sum of digits of n first primes for some n.

+0
3

2, 5, 17, 19, 23, 31, 41, 61, 71, 83, 181, 269, 389, 419, 449, 631, 683, 727, 743, 809, 929, 1039, 1061, 1069, 1091, 1277, 1381, 1481, 1567, 1613, 1747, 1873, 1951, 1993, 2039, 2129, 2281, 2297, 2339, 2381, 2549, 2579 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`M. F. Hasler, Table of n, a(n) for n = 1..1000`
	FORMULA	`a(n)=A007605(1)+...+A007605(A104248(n))`
	EXAMPLE	`a(4)=19 because A104248(4)= 5 and sum of digits of 5 first primes, 2+3+5+7+(1+1)=19 is prime.`
	CROSSREFS	`Corresponding n's: A104248. Primes: A000040, sum of digits of primes: A007605.` `Cf. A075544.` `Adjacent sequences: A104244 A104245 A104246 this_sequence A104248 A104249 A104250` `Sequence in context: A123364 A025553 A075544 this_sequence A095287 A020608 A075612`
	KEYWORD	`nonn,base`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Feb 26 2005`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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