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

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A176538 Partial sums of A018891. 0
 0, 0, 1, 1, 2, 2, 3, 4, 5, 8, 10, 17, 26, 43, 90 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Partial sums of number of positive knots with n crossings. The subsequence of distinct primes in this partial sum begins: 2, 3, 5, 17, 43. LINKS Table of n, a(n) for n=1..15. Index entries for sequences related to knots FORMULA a(n) = SUM[i=1..n] A018891(i). EXAMPLE a(15) = 0 + 0 + 1 + 0 + 1 + 0 + 1 + 1 + 1 + 3 + 2 + 7 + 9 + 17 + 47 = 90. CROSSREFS Cf. A018891. Sequence in context: A228693 A116676 A240575 * A285261 A100483 A182613 Adjacent sequences: A176535 A176536 A176537 * A176539 A176540 A176541 KEYWORD nonn AUTHOR Jonathan Vos Post, Apr 19 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 4 22:39 EST 2023. Contains 367565 sequences. (Running on oeis4.)