login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A156614 a(1)=2, a(n+1) is the smallest prime with sum of even digits >= sum of even digits of a(n). 0
2, 23, 29, 41, 43, 47, 61, 67, 83, 89, 181, 263, 269, 281, 283, 461, 463, 467, 487, 661, 683, 863, 881, 883, 887, 1889, 2683, 2687, 2689, 2861, 2887, 4861, 4889, 6689, 6863, 6869, 6883, 8681, 8689, 8861, 8863, 8867, 8887, 26881 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

An increasing sequence of primes a(n) such that the sequence A071648(a(n)) is nondecreasing. - R. J. Mathar, May 15 2010

LINKS

Table of n, a(n) for n=1..44.

EXAMPLE

2, 23(2=2), 29(2=2), 41(4>2), 43(4=4), 61(6>4), 67(6=6), 83(8>6), 89(8=8), 181(8=8), 263(2+6=8), 269(2+6=2+6), 281(2+8>2+6), 283(2+8=2+8), 461(4+6=2+8), etc.

MATHEMATICA

t={}; max=0; Do[p=Prime[i]; If[(x=Total[Select[IntegerDigits[p], EvenQ[#] &]])>=max, max = x; AppendTo[t, p]], {i, 3000}]; t (* Jayanta Basu, May 22 2013 *)

CROSSREFS

Cf. A000040.

Sequence in context: A141533 A045391 A154758 * A226016 A235150 A114549

Adjacent sequences:  A156611 A156612 A156613 * A156615 A156616 A156617

KEYWORD

nonn,base,less

AUTHOR

Juri-Stepan Gerasimov, Feb 11 2009

EXTENSIONS

Corrected (4861 inserted) by R. J. Mathar, May 15 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 19 04:40 EDT 2019. Contains 328211 sequences. (Running on oeis4.)