Location via proxy:   [ UP ]   [Report a bug]   [Manage cookies]    No cookies    No scripts    No ads    No referrer    Show this form

login

The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A023530 Sum of exponents in prime-power factorization of p(n)*p(n-1) + 1. 1 1, 1, 4, 4, 3, 6, 3, 6, 3, 3, 6, 4, 4, 6, 3, 4, 5, 8, 5, 4, 10, 5, 3, 3, 3, 4, 6, 4, 10, 3, 7, 4, 4, 6, 5, 8, 3, 5, 4, 4, 6, 10, 5, 14, 3, 8, 5, 3, 5, 8, 3, 4, 12, 5, 3, 6, 4, 10, 5, 3, 6, 6, 7, 3, 10, 4, 7, 4, 5, 8, 3, 6, 4, 4, 5, 4, 5, 4, 5, 6 (list; graph; refs; listen; history; text; internal format) OFFSET 1,3 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 MATHEMATICA Join[{1}, Total[FactorInteger[#][[All, 2]]]&/@(Times@@@Partition[Prime[ Range[ 90]], 2, 1]+1)] (* Harvey P. Dale, Apr 21 2020 *) CROSSREFS Sequence in context: A072420 A258075 A286296 * A337365 A345294 A233581 Adjacent sequences: A023527 A023528 A023529 * A023531 A023532 A023533 KEYWORD nonn AUTHOR Clark Kimberling STATUS approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 18 07:06 EDT 2024. Contains 375255 sequences. (Running on oeis4.)