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!)
 A173242 Partial sums of A027642. 0
 1, 3, 9, 10, 40, 41, 83, 84, 114, 115, 181, 182, 2912, 2913, 2919, 2920, 3430, 3431, 4229, 4560, 4560, 4561, 4699, 4700, 7430, 7431, 7437, 7438, 8308, 8309, 22631, 22632, 23142, 23143, 23149, 23150, 1942340, 1942341, 1942347, 1942348, 1955878 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Primes in this sequence are 3, 41, 83, 181, 4229, 4561, 23143, 2007527, ... . LINKS FORMULA a(n) = SUM[i=0..n] A027642(i) = SUM[i=0..n] (Denominator of Bernoulli number B_i). EXAMPLE a(61) = 1 + 2 + 6 + 1 + 30 + 1 + 42 + 1 + 30 + 1 + 66 + 1 + 2730 + 1 + 6 + 1 + 510 + 1 + 798 + 1 + 330 + 1 + 138 + 1 + 2730 + 1 + 6 + 1 + 870 + 1 + 14322 + 1 + 510 + 1 + 6 + 1 + 1919190 + 1 + 6 + 1 + 13530 + 1 + 1806 + 1 + 690 + 1 + 282 + 1 + 46410 + 1 + 66 + 1 + 1590 + 1 + 798 + 1 + 870 + 1 + 354 + 1 + 56786730 + 1. CROSSREFS Cf. A027642, A027641, A002882, A003245, A127187, A127188, A138243, A028246, A143343, A080092, A141056, A027760. Sequence in context: A136852 A031115 A004669 * A335030 A335029 A228450 Adjacent sequences:  A173239 A173240 A173241 * A173243 A173244 A173245 KEYWORD nonn AUTHOR Jonathan Vos Post, Feb 13 2010 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 June 5 16:19 EDT 2020. Contains 334852 sequences. (Running on oeis4.)