This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A046485 Sum of first n palindromic primes A002385. 3
 2, 5, 10, 17, 28, 129, 260, 411, 592, 783, 1096, 1449, 1822, 2205, 2932, 3689, 4476, 5273, 6192, 7121, 17422, 27923, 38524, 49835, 61246, 73667, 86388, 99209, 112540, 126371, 140302, 154643, 169384, 184835, 200386, 216447, 232808, 249369, 266030, 283501 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The subsequence of prime partial sum of palindromic primes begins: 2, 5, 17, 5273, 7121, 154643, 283501. What is the smallest nontrivial (i.e. multidigit) palindromic prime partial sum of palindromic primes? [Jonathan Vos Post, Feb 07 2010] LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..700 P. De Geest, World!Of Palindromic Primes FORMULA a(n) = SUM[i=1..n] A002385(i) = SUM[i=1..n] {p prime and R(p) = p, i.e. primes whose decimal expansion is a palindrome}. [Jonathan Vos Post, Feb 07 2010] MATHEMATICA t = {}; b = 10; Do[p = Prime[n]; i = IntegerDigits[p, b]; If[i == Reverse[i], AppendTo[t, p]; (*Print[p.FromDigits[i]]*)], {n, 4000}]; Accumulate[t] (* Vladimir Joseph Stephan Orlovsky, Feb 23 2012 *) Accumulate[Select[Prime[Range[10000]], IntegerDigits[#]==Reverse[ IntegerDigits[#]]&]] (* Harvey P. Dale, Aug 10 2013 *) CROSSREFS Cf. A002385, A007504, A046489. Cf. A000040, A007500, A006567, A016041, A029732, A117697. [Jonathan Vos Post, Feb 07 2010] Sequence in context: A172982 A178137 A071602 * A294562 A109377 A109472 Adjacent sequences:  A046482 A046483 A046484 * A046486 A046487 A046488 KEYWORD nonn,base AUTHOR Patrick De Geest, Sep 15 1998. EXTENSIONS Offset set to 1 - R. J. Mathar, Feb 21 2010 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified July 20 12:30 EDT 2018. Contains 312804 sequences. (Running on oeis4.)