1,1

Largest prime of sum of three primes are primes of the form p*q - p - q, where p and q are two successive primes (A096345).

a(n) = A096345(n) - A001043(n).

a(1) = 15 because 15 = 3+5+7 with 3*5 =15;

a(2) = 35 because 35 = 5+7+23 with 5*7=35;

a(3) = 77 because 77 = 7+11+59 with 7*11=77;

a(4) = 221 because 221= 13+17+191 with 13*17=221

Cf. A096345.

Sequence in context: A160497 A098271 A082663 this_sequence A061367 A070161 A142591

Adjacent sequences: A109065 A109066 A109067 this_sequence A109069 A109070 A109071

nonn

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Aug 17 2005