A247474 Numbers formed by concatenating two successive primes and their sum.

235, 358, 5712, 71118, 111324, 131730, 171936, 192342, 232952, 293160, 313768, 374178, 414384, 434790, 4753100, 5359112, 5961120, 6167128, 6771138, 7173144, 7379152, 7983162, 8389172, 8997186, 97101198, 101103204, 103107210, 107109216, 109113222, 113127240

Offset

1,1

Comments

After the first term, every term is even.

Links

Michael De Vlieger, Table of n, a(n) for n = 1..10000

Example

For n=1 the two successive primes are 2 and 3, 2+3=5. Therefore the number created is 235.

Mathematica

a247474[n_Integer] := Module[{p, f}, p := Prime /@ List[n, n + 1]; FromDigits@Flatten@Join[IntegerDigits[p], IntegerDigits[Plus @@ p]]]; a247474/@Range[120] (* Michael De Vlieger, Dec 01 2014 *)
FromDigits[Join[IntegerDigits[#[[1]]], IntegerDigits[#[[2]]], IntegerDigits[ Total[#]]]]&/@Partition[Prime[Range[40]], 2, 1] (* Harvey P. Dale, Jul 29 2015 *)

Crossrefs

Cf. A001043, A045533.

Sequence in context: A049857 A218038 A132903 * A147148 A173629 A097487

Adjacent sequences: A247471 A247472 A247473 * A247475 A247476 A247477

Keyword

nonn,base

Author

Jennifer Jin, Nov 30 2014

Status

approved