a(n) is the smallest m for which there appears for the first time a prime p which equals odd part of sum of digits of m^2.
A225430
a(n) is the smallest m for which there appears for the first time a prime p which equals odd part of sum of digits of m^2.
Terms
- a(0) =4a(1) =7a(2) =8a(3) =17a(4) =43a(5) =83a(6) =167a(7) =314a(8) =707a(9) =836a(10) =6833a(11) =8167a(12) =21886a(13) =41833a(14) =89437a(15) =134164a(16) =947617a(17) =987917a(18) =3143167a(19) =3162083a(20) =9272917a(21) =24060133a(22) =60827617a(23) =434738887a(24) =529027313a(25) =2641873937a(26) =5383305583a(27) =14141757313
External references
- oeis: A225430