Numbers k such that the product of Euler phi of the 2 consecutive integers {k,k+1} is a 4th power: if sqrt(sqrt(phi(k)*phi(k+1))) is an integer, then k is here.
A082788
Numbers k such that the product of Euler phi of the 2 consecutive integers {k,k+1} is a 4th power: if sqrt(sqrt(phi(k)*phi(k+1))) is an integer, then k is here.
Terms
- a(0) =1a(1) =259a(2) =1260a(3) =2071a(4) =2834a(5) =7574a(6) =7749a(7) =9252a(8) =12800a(9) =18720a(10) =28236a(11) =30039a(12) =32724a(13) =42120a(14) =45395a(15) =45877a(16) =68124a(17) =102656a(18) =135813a(19) =246543a(20) =264440a(21) =341288a(22) =389455a(23) =423163a(24) =480624a(25) =523775a(26) =936471a(27) =937248a(28) =1055954a(29) =1182104
External references
- oeis: A082788