id:A129747 - OEIS Search Results

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Numbers n such that the sum of the first n primes with the final digit 7 is prime.

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1, 3, 7, 9, 11, 17, 31, 43, 63, 77, 81, 101, 109, 111, 117, 123, 127, 137, 147, 149, 153, 157, 161, 167, 171, 193, 199, 231, 233, 241, 243, 281, 311, 317, 321, 327, 329, 347, 367, 393, 421, 433, 439, 443, 483, 499, 531, 587, 591, 611, 619, 621, 623, 679, 683 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=primes in A030432 added to obtain A129079(n)`
	CROSSREFS	`Cf. A129079; A000040; A030432.` `Sequence in context: A075607 A156770 A088630 this_sequence A004614 A112398 A167800` `Adjacent sequences: A129744 A129745 A129746 this_sequence A129748 A129749 A129750`
	KEYWORD	`easy,base,less,nonn`
	AUTHOR	`Tomas Xordan (xordan.tom(AT)gmail.com), May 14 2007`

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Last modified November 22 20:51 EST 2009. Contains 167312 sequences.

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