cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A130445 Integers in the range [1, 425] not expressible as a difference of the unique optimal Golomb ruler of order 24. See A130444.

Original entry on oeis.org

128, 137, 150, 159, 161, 165, 166, 169, 178, 183, 185, 187, 188, 194, 200, 202, 206, 207, 209, 218, 221, 222, 223, 225, 227, 230, 233, 236, 237, 238, 247, 250, 254, 257, 258, 259, 260, 264, 265, 266, 267, 268, 270, 272, 275, 276, 279, 280, 282, 284, 290
Offset: 1

Views

Author

Joseph Biberstine (jrbibers(AT)indiana.edu), May 26 2007

Keywords

Comments

This sequence has exactly 149 terms. The union of this with A130446 yields all integers in the range [1,425].

Examples

			128 is a term of this sequence between there do not exist integers 1 <= i < j <= 425 such that A130444(j) - A130444(i) = 128.
		

Crossrefs

Cf. A130444: Main entry. A130446: Integers in [1, 425] expressible as a difference from A130444.

Programs

  • Mathematica
    A130444 = {0, 9, 33, 37, 38, 97, 122, 129, 140, 142, 152, 191, 205, 208, 252, 278, 286, 326, 332, 353, 368, 384, 403, 425}; Complement[Range[Last[A130444]], Sort[(A130444[[ #[[1]]]] - A130444[[ #[[2]]]]) & /@ Select[Tuples[Range[24], 2], #[[1]] > #[[2]] &]]]