A054538 A000013 / 2.

1, 1, 2, 2, 4, 5, 10, 15, 28, 47, 90, 158, 298, 548, 1034, 1928, 3658, 6899, 13136, 24970, 47710, 91181, 174858, 335546, 645436, 1242767, 2397044, 4628198, 8948416, 17318417, 33555466, 65075294, 126324496, 245426708

Offset

1,3

Links

Table of n, a(n) for n=1..34.

Crossrefs

Sequence in context: A114851 A099364 A125951 * A238020 A095020 A340775

Adjacent sequences: A054535 A054536 A054537 * A054539 A054540 A054541

Keyword

nonn

Author

N. J. A. Sloane, Apr 10 2000

Status

approved