id:A034813 - OEIS Search Results

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Concatenations C1 and C2 are both prime (see the comment lines).

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36, 74, 104, 132, 188, 222, 224, 305, 317, 344, 367, 368, 389, 457, 458, 475, 540, 572, 584, 608, 631, 676, 682, 689, 697, 738, 756, 760, 781, 797, 829, 841, 893, 910, 911, 914, 928, 982, 1018, 1104, 1122, 1178, 1186, 1317, 1328, 1391, 1402, 1406, 1518 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`C1 = 'prevprime(n) followed by n followed by nextprime(n)'` `C2 = 'nextprime(n) followed by n followed by prevprime(n)'`
	EXAMPLE	`n=797 -> previous prime is 787, next prime is 809, thus '787797809' and '809797787' are both primes.`
	CROSSREFS	`Cf. A034808-A034821.` `Sequence in context: A024973 A024975 A025399 this_sequence A111163 A136359 A084006` `Adjacent sequences: A034810 A034811 A034812 this_sequence A034814 A034815 A034816`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.`

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Last modified December 4 14:15 EST 2008. Contains 151279 sequences.

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