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!)
 A333480 Lexicographically earliest sequence of distinct positive integers such that the decimal expansions of neither a(n)/a(n+1) nor a(n+1)/a(n) contains a significant digit present in either a(n) or a(n+1). 1
 2, 3, 5, 6, 8, 4, 11, 40, 12, 400, 22, 24, 72, 44, 36, 9, 18, 48, 16, 80, 33, 37, 45, 15, 50, 30, 20, 60, 54, 66, 55, 82, 75, 25, 220, 32, 288, 96, 396, 88, 64, 192, 576, 640, 480, 144, 4000, 110, 41, 148, 74, 90, 27, 81, 165, 495, 297, 99, 198, 540, 150, 444, 364, 2002, 224, 42, 7, 14, 70, 21 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS By "significant digit" we mean to exclude from the quotients any zeros preceding the first nonzero digit, as well as zeros following the last nonzero digit (as in a terminating decimal). Is the sequence infinite? LINKS EXAMPLE a(1)/a(2) = 2/3 = 0.666... and a(2)/a(1) = 3/2 = 1.5 and their combined distinct significant digits (1,5,6) are exclusive of the combined distinct digits of a(1) and a(2), (2,3). a(7)/a(8) = 11/40 = 0.275 and a(8)/a(7) = 40/11 = 3.636363... and their combined distinct significant digits (2,3,5,6,7) are exclusive of the combined distinct digits of a(7) and a(8), (0,1,4). a(106)/a(107) = 624/208 = 3 and a(107)/a(106) = 208/624 = 0.333... and their combined distinct significant digits (3) is exclusive of the combined distinct digits of a(106) and a(107), (0,2,4,6,8). CROSSREFS Sequence in context: A067077 A067183 A269670 * A036587 A075145 A086142 Adjacent sequences:  A333477 A333478 A333479 * A333481 A333482 A333483 KEYWORD nonn,base AUTHOR Eric Angelini and Hans Havermann, Mar 23 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 January 27 04:11 EST 2021. Contains 340443 sequences. (Running on oeis4.)