OFFSET
1,2
COMMENTS
Numbers n such that A263042(n) is prime. - Robert Israel, May 07 2020
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
FORMULA
For example 387 gives 7*2+8*3+3*5=53, a prime.
MAPLE
filter:= proc(n) local L, i;
L:= convert(n, base, 10);
isprime(add(L[i]*P[i], i=1..nops(L)));
end proc:
select(filter, [$1..100]); # Robert Israel, May 07 2020
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Yalcin Aktar, Feb 21 2007
STATUS
approved