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 A162705 Numbers that are the sum of two reversed consecutive primes in more than one way. 1
 582, 1026, 1032, 1038, 1092, 1122, 1128, 1134, 1152, 1296, 1644, 1716, 4152, 4344, 4602, 4932, 5068, 5562, 5808, 8706, 8862, 8988, 9012, 9036, 9066, 9264, 9726, 10110, 10308, 10326, 10342, 10398, 10638, 10698, 10764, 10794, 10806, 10866, 10912, 10944, 10998 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Subsequence of A162704. - R. J. Mathar, Jul 13 2009 LINKS Sean A. Irvine, Table of n, a(n) for n = 1..115 EXAMPLE 582 = R(191) + R(193) = 191 + 391 and R(683) + R(691) = 386 + 196. 1032 = R(113) + R(127) = 311 + 721 = R(613) + R(617) = 316 + 716. MAPLE read("transforms") ; A055642 := proc(n) max(1, ilog10(n)+1) ; end: A004087 := proc(n) option remember; digrev(ithprime(n)) ; end: isA162705 := proc(n) c := 0 ; for i from 1 do p := ithprime(i) ; if A055642(p) > A055642(n) then break; fi; if A004087(i)+A004087(i+1) = n then c := c+1; fi; od: RETURN(c > 1); end: for n from 1 to 10000 do if isA162705(n) then printf("%d, ", n) ; fi; od: # R. J. Mathar, Jul 13 2009 MATHEMATICA Sort[Transpose[Select[Tally[FromDigits[Reverse[IntegerDigits[#[[1]]]]] + FromDigits[Reverse[IntegerDigits[#[[2]]]]]&/@Partition[Prime[Range[ 2000]], 2, 1]], Last[#]>1&]][[1]]] (* Harvey P. Dale, Nov 14 2012 *) CROSSREFS Cf. A004087, A162704. Sequence in context: A172835 A172883 A260541 * A244344 A059468 A350663 Adjacent sequences: A162702 A162703 A162704 * A162706 A162707 A162708 KEYWORD nonn,base AUTHOR Claudio Meller, Jul 11 2009 EXTENSIONS Keyword:base plus more terms from R. J. Mathar, Jul 13 2009 Typo in first example corrected by R. J. Mathar, Jul 22 2009 More terms from Sean A. Irvine, Nov 14 2010 STATUS approved

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Last modified August 13 20:30 EDT 2024. Contains 375144 sequences. (Running on oeis4.)