A027321 Duplicate of A027315.

1, 2, 6, 20, 90, 692, 5774, 48924, 417440, 3580036, 30831756, 266463804

Offset

0,2

Links

Table of n, a(n) for n=0..11.

Crossrefs

Sequence in context: A336544 A000666 A180890 * A027315 A005965 A000421

Adjacent sequences: A027318 A027319 A027320 * A027322 A027323 A027324

Keyword

dead

Status

approved