id:A119488 - OEIS Search Results

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A119488

Primes of the form (i+1.th prime)*(i+1) - (i.th prime)*i.

+0
2

13, 23, 41, 83, 103, 89, 103, 113, 227, 229, 547, 373, 419, 263, 373, 787, 419, 433, 593, 563, 577, 739, 487, 811, 823, 683, 1013, 599, 1153, 641, 827, 1571, 1223, 863, 883, 719, 1567, 1187, 1279, 1999, 1361, 1373, 1951, 1297, 2477, 1091, 1399, 1117, 2897 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`The fourth prime is 7 and the third is 5.` `Therefore 74 - 53 = 28 - 15 = 13 that is a prime.`
	MAPLE	`P:=proc(n) local i, j; for i from 1 by 1 to n do j:=ithprime(i+1)(i+1)-ithprime(i)i; if isprime(j) then print(i); fi; od; end: P(200);`
	CROSSREFS	`Cf. A119487.` `Sequence in context: A164494 A164407 A135283 this_sequence A165350 A112394 A067227` `Adjacent sequences: A119485 A119486 A119487 this_sequence A119489 A119490 A119491`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), May 23 2006`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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