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!)
 A371378 Prime numbers wherein digit values decrease, increase, and finally decrease. 1
 1021, 1031, 1051, 1061, 1063, 1087, 1091, 1093, 1097, 2053, 2063, 2081, 2083, 2087, 2131, 2141, 2143, 2153, 2161, 3041, 3061, 3083, 3121, 3163, 3181, 3187, 3191, 3251, 3253, 3271, 4021, 4051, 4073, 4091, 4093, 4153, 4231, 4241, 4243, 4253, 4261, 4271, 4273, 4283 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Terms must have at least 4 digits. The sequence is finite. There are 3136837 terms, with the last being 98765432101234567987654321. - Michael S. Branicky, Mar 20 2024 LINKS Alois P. Heinz, Table of n, a(n) for n = 1..10000 Michael S. Branicky, Alternative Python program for full sequence A371378 James S. DeArmon, LISP Code for A371378 MAPLE q:= proc(n) local i, l, s; l, s:= convert(n, base, 10), 1; for i to nops(l)-1 while s<5 do s:= `if`(l[i]=l[i+1], 5, `if`(l[i]

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 30 18:38 EDT 2024. Contains 372971 sequences. (Running on oeis4.)