The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A189952 1/4 the number of arrangements of 3 nonzero numbers x(i) in -n..n with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero 2
 2, 8, 15, 29, 39, 61, 75, 103, 124, 155, 176, 225, 250, 289, 325, 381, 413, 475, 512, 578, 626, 688, 730, 826, 877, 947, 1009, 1095, 1150, 1255, 1317, 1419, 1489, 1578, 1650, 1789, 1862, 1959, 2040, 2176, 2254, 2391, 2476, 2601, 2708, 2831, 2918, 3098, 3197 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A189951 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 EXAMPLE Some solutions with n=3 .-2....3....2....1...-2...-2...-3....1...-3...-3...-3...-3....2....1....3...-3 ..2....3....1...-1...-1...-2...-3...-3...-3...-3....3....1...-2....1...-1...-1 .-2...-1...-1...-1...-1...-2....1....2....3...-3....3....1....2...-1...-1...-1 CROSSREFS Sequence in context: A318272 A244476 A292202 * A077598 A095298 A297734 Adjacent sequences: A189949 A189950 A189951 * A189953 A189954 A189955 KEYWORD nonn AUTHOR R. H. Hardin May 02 2011 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 May 21 01:24 EDT 2024. Contains 372720 sequences. (Running on oeis4.)