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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115653 Prime numbers which are the sum of distinct double factorials (A006882). 3

%I #2 Mar 30 2012 17:40:35

%S 2,3,5,11,13,17,19,23,29,53,59,61,67,71,73,107,109,113,131,157,163,

%T 167,173,179,181,389,397,401,409,433,443,449,457,461,491,499,503,509,

%U 541,547,557,563,947,953,971,997,1009,1013,1019,1021,1051,1061,1063

%N Prime numbers which are the sum of distinct double factorials (A006882).

%C Double factorials 0!! and 1!! are not considered distinct. Note that double factorial (n!!) is different from (n!)!.

%e 947 is prime and 947 = 9!! + 2!!.

%Y Cf. A006882, A115651, A115652, A115654.

%K nonn

%O 1,1

%A _Giovanni Resta_, Jan 28 2006

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 July 17 05:50 EDT 2024. Contains 374360 sequences. (Running on oeis4.)