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 A117300 Consider all pairs (p,q) of consecutive primes such that p and q both have k digits and q-p = k; sequence lists the values of q. 2
 3, 13, 19, 31, 43, 61, 73, 1013, 1091, 1097, 1217, 1283, 1301, 1307, 1427, 1433, 1451, 1487, 1493, 1553, 1571, 1583, 1601, 1613, 1667, 1697, 1787, 1871, 1877, 1997, 2003, 2087, 2141, 2207, 2243, 2273, 2297, 2351, 2381, 2393, 2441, 2477, 2543, 2621, 2663 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..10000 EXAMPLE 31 is in the sequence because (1) it is a 2-digit prime number, (2) the previous 2-digit prime number is 29 and (3) 31-29=2 1451 is in the sequence because (1) it is a 4-digit prime number, (2) the previous 4-digit prime number is 1447 and (3) 1451-1447=4 MATHEMATICA Transpose[Select[Partition[Prime[Range[400]], 2, 1], IntegerLength[#[[1]]] == IntegerLength[#[[2]]]&&#[[2]]-#[[1]]==IntegerLength[#[[1]]]&]][[2]] (* Harvey P. Dale, Nov 01 2015 *) CROSSREFS Cf. A117155. Sequence in context: A168425 A252090 A079419 * A023215 A185069 A023239 Adjacent sequences:  A117297 A117298 A117299 * A117301 A117302 A117303 KEYWORD base,nonn AUTHOR Luc Stevens (lms022(AT)yahoo.com), Apr 21 2006 EXTENSIONS Edited by N. J. A. Sloane, Apr 29 2007 Corrected by Harvey P. Dale, Nov 01 2015 STATUS approved

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Last modified October 23 16:40 EDT 2020. Contains 337969 sequences. (Running on oeis4.)