OFFSET
1,1
COMMENTS
127 is a term because 1^2 + 2^2 + 7^2 - 1 = 53 (prime);
149 is a term because 1^2 + 4^2 + 9^2 - 1 = 97;
347 is a term because 3^2 + 4^2 + 7^2 - 1 = 73.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1300
MAPLE
A003132 := proc(n) local d; add(d^2, d=convert(n, base, 10)) ; end proc: A167414 := proc(n) local p; if n = 1 then 2; else p := nextprime(procname(n-1)) ; while not isprime(A003132(p)-1) do p := nextprime(p) ; end do ; return p end if ; end proc: seq(A167414(n), n=1..80) ; # R. J. Mathar, Nov 04 2009
MATHEMATICA
Select[Prime[Range[3000]], PrimeQ[Total[IntegerDigits[#]^2] - 1] &] (* Vincenzo Librandi, Sep 25 2014 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Vincenzo Librandi, Nov 03 2009
EXTENSIONS
2 and terms larger than 941 added by R. J. Mathar, Nov 04 2009
STATUS
approved