1,1

a(3) = 22193, since 22193,22229,22247 are three consecutive primes with digit sum 17 and this is the first occurrence of three consecutive primes with equal digit sum.

Cf. A006567, A070905, A071614.

Sequence in context: A003391 A080778 A007513 this_sequence A101702 A119780 A120840

Adjacent sequences: A071610 A071611 A071612 this_sequence A071614 A071615 A071616

base,more,nonn

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), May 27 2002