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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A331560 Size of the palindrome-free intervals about the 196-iterates, A006960. 2
 11, 10, 110, 110, 100, 100, 110, 1100, 1000, 11000, 11000, 11000, 11000, 10000, 10000, 10000, 11000, 110000, 110000, 100000, 100000, 1100000, 1100000, 1100000, 1000000, 1000000, 11000000, 11000000, 10000000, 10000000, 110000000, 110000000, 110000000, 100000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS By empirical observation, the integers in this sequence are of the form 10*10^n and 11*10^n, n >= 0, since they are the difference of consecutive palindromes surrounding the 196-iterates. (No differences of 2 observed.) LINKS Table of n, a(n) for n=1..34. FORMULA a(n) = A331556(n) + A331557(n). EXAMPLE 191 < 196 < 202, 202 - 191 = 11; 878 < 887 < 888, 888 - 878 = 10; etc. PROG (Python) # Palindrome-free interval about 196 offsets. Slow brute-force n = 196 while n < 10**15: m = n while m != int(str(m)[::-1]): m+=1 s = m m = n while m != int(str(m)[::-1]): m-=1 print(s-m) n = n + int(str(n)[::-1]) CROSSREFS Cf. A006960, A331556, A331557. Sequence in context: A304747 A304749 A105028 * A014550 A367547 A070836 Adjacent sequences: A331557 A331558 A331559 * A331561 A331562 A331563 KEYWORD nonn,base AUTHOR _James D. Klein_, Jan 20 2020 EXTENSIONS a(31)-a(34) from _Jinyuan Wang_, Feb 29 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 5 06:47 EST 2024. Contains 370537 sequences. (Running on oeis4.)