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!)
 A121853 Cumulative product of A000120. 0
 1, 1, 1, 2, 2, 4, 8, 24, 24, 48, 96, 288, 576, 1728, 5184, 20736, 20736, 41472, 82944, 248832, 497664, 1492992, 4478976, 17915904, 35831808, 107495424, 322486272, 1289945088, 3869835264, 15479341056, 61917364224, 309586821120 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS This sequence does not always have prime exponents decreasing (i.e., is not always a product of primorial numbers). The first exception is a(5932), which is divisible by 7^1214, but only 5^1213. LINKS FORMULA a(n) = Product_{k=1}^n A000120(k). MATHEMATICA Join[{1}, FoldList[Times, Table[DigitCount[n, 2, 1], {n, 40}]]] (* Harvey P. Dale, Dec 08 2015 *) CROSSREFS Cf. A000120, A002110, A025487. Sequence in context: A100396 A056630 A259813 * A064451 A223027 A325514 Adjacent sequences:  A121850 A121851 A121852 * A121854 A121855 A121856 KEYWORD nonn AUTHOR Franklin T. Adams-Watters, Aug 30 2006 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 February 28 22:12 EST 2020. Contains 332335 sequences. (Running on oeis4.)