1,2

a(6)=41 since the first palindromic substring of length 6

appears in 2^41=2199023(255552).

Cf. A115943.

Sequence in context: A070869 A101196 A064637 this_sequence A052059 A041526 A041524

Adjacent sequences: A115939 A115940 A115941 this_sequence A115943 A115944 A115945

nonn,base

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006