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!)
 A330963 For any n >= 0: consider all pairs of numbers (x, y) whose binary representations can be interleaved (or shuffled) to produce the binary representation of n (possibly with leading zeros); a(n) is the least possible value of abs(x^2 - y^2). 2
 0, 1, 1, 0, 1, 0, 3, 8, 1, 0, 0, 5, 0, 5, 5, 0, 1, 0, 0, 5, 0, 5, 5, 0, 9, 7, 5, 0, 7, 16, 27, 40, 1, 0, 0, 5, 0, 5, 5, 0, 0, 7, 5, 0, 7, 0, 11, 24, 0, 8, 5, 0, 7, 0, 0, 13, 20, 11, 0, 13, 0, 13, 13, 0, 1, 0, 0, 5, 0, 5, 5, 0, 0, 7, 5, 0, 7, 0, 11, 24, 0, 8, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,7 LINKS Rémy Sigrist, C program for A330963 EXAMPLE For n = 5: - the binary representation of 5 is "101", - the possible values for (x, y), restricted to x >= y without loss of generality, are:   bin(5)   x  y  |x^2-y^2|   -------  -  -  ---------   "101"    5  0         25   "1/01"   1  1          0   "10/1"   2  1          3   "1/0/1"  3  0          9 - hence a(5) = 0. PROG (C) See Links section. CROSSREFS See A330925 for similar sequences. Cf. A327195. Sequence in context: A076482 A225802 A156827 * A327195 A140272 A210962 Adjacent sequences:  A330960 A330961 A330962 * A330964 A330965 A330966 KEYWORD nonn,base AUTHOR Rémy Sigrist, Jan 04 2020 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 September 24 03:33 EDT 2020. Contains 337315 sequences. (Running on oeis4.)