The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A247475 Numbers formed by concatenating two successive primes and their product. 1
 236, 3515, 5735, 71177, 1113143, 1317221, 1719323, 1923437, 2329667, 2931899, 31371147, 37411517, 41431763, 43472021, 47532491, 53593127, 59613599, 61674087, 67714757, 71735183, 73795767, 79836557, 83897387 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Michael De Vlieger, Table of n, a(n) for n = 1..10000 EXAMPLE For n=1 the successive primes are 2 and 3, so the number formed is 236. MATHEMATICA a247475[n_Integer] := Module[{p}, p := Prime /@ List[n, n + 1]; FromDigits@Flatten@Join[IntegerDigits[p], IntegerDigits[Times @@ p]]]; a247475/@Range[120] (* Michael De Vlieger, Dec 01 2014 *) CROSSREFS Sequence in context: A233983 A251491 A251484 * A233166 A138820 A218649 Adjacent sequences:  A247472 A247473 A247474 * A247476 A247477 A247478 KEYWORD nonn,base AUTHOR Jennifer Jin, Nov 30 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 6 11:48 EST 2021. Contains 349563 sequences. (Running on oeis4.)