0,5

a(n) = A000969(n)-A139250(n+1).

Cf. A000969, A139250, 153006, A153007, A159790, A160166.

Sequence in context: A010607 A118522 A098316 this_sequence A084055 A084103 A036477

Adjacent sequences: A160162 A160163 A160164 this_sequence A160166 A160167 A160168

more,nonn

Omar E. Pol (info(AT)polprimos.com), May 23 2009