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!)
 A085895 Group the natural numbers such that the product of the n-th group is divisible by 2^n. (1), (2), (3,4), (5,6,7,8), (9,10,11,12,13,14),(15,16,17,18), ... Sequence contains the product of the terms of the groups. 3
 1, 2, 12, 1680, 2162160, 73440, 96909120, 424097856000, 5339572260422400, 57407703889536000, 1573144097507348889600, 89247024757574635311360000, 131197375012291112448000, 6932022668773077815267328000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS FORMULA From Chayim Lowen, Jul 29 2015: (Start) Product_{m=0..n} a(m) = (A085897(n+1)-1)! whence: a(n) = (A085897(n+1)-1)!/a(n-1). a(n) = (A085897(n+1)-1)!/(A085897(n)-1)!. (End) EXAMPLE a(3) = 1680 = 5*6*7*8 = 2^3*(5*6*7) is divisible by 2^3=8. (In fact, it is divisible by 2^4, but 5*6*7 is not divisible by 8.) CROSSREFS Cf. A085896, A085897, A085898. Sequence in context: A111180 A235857 A085912 * A090904 A125295 A222065 Adjacent sequences:  A085892 A085893 A085894 * A085896 A085897 A085898 KEYWORD nonn AUTHOR Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 10 2003 EXTENSIONS More terms from Ray Chandler, Sep 13 2003 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 May 11 13:41 EDT 2021. Contains 343791 sequences. (Running on oeis4.)