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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A160668 Distance between prime(n) and the next higher power of 10. 4
 8, 7, 5, 3, 89, 87, 83, 81, 77, 71, 69, 63, 59, 57, 53, 47, 41, 39, 33, 29, 27, 21, 17, 11, 3, 899, 897, 893, 891, 887, 873, 869, 863, 861, 851, 849, 843, 837, 833, 827, 821, 819, 809, 807, 803, 801, 789, 777, 773, 771, 767, 761, 759, 749, 743, 737, 731, 729, 723 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS G. C. Greubel, Table of n, a(n) for n = 1..10000 FORMULA From Alois P. Heinz, Dec 08 2017: (Start) a(n) = 10^A055642(A000040(n)) - A000040(n). a(n) = A228628(n) + 1 = A061601(A000040(n)) + 1. (End) EXAMPLE a(1)=8 because 10^1=10, and 10-2, 1st prime 2, = 8; a(5)=89 because 10^2=100 and 100-11, 5th prime 11, = 89. MAPLE a:= n-> (p-> 10^length(p)-p)(ithprime(n)): seq(a(n), n=1..100);  # Alois P. Heinz, Dec 08 2017 MATHEMATICA Table[10^Ceiling[Log[Prime[n]]/Log[10]] - Prime[n], {n, 1, 100}] (* G. C. Greubel, May 02 2018 *) PROG (UBASIC) 20 N=3:print N:C=2 30 A=3:S=sqrt(N) 40 B=N/A 50 if A*B=int(N) then 70 60 A=A+2:if A

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 June 20 06:23 EDT 2021. Contains 345157 sequences. (Running on oeis4.)