A287880 Row sums of triangle in A287879, divided by 2.

1, 3, 7, 25, 61, 219, 547, 1937, 4921, 17203, 44287, 153193, 398581, 1366795, 3587227, 12211873, 32285041, 109226595, 290565367, 977773625, 2615088301, 8758657339, 23535794707, 78500250929, 211822152361, 703877909907, 1906399371247, 6313707508105, 17157594341221, 56650974993259

Offset

1,2

Links

Table of n, a(n) for n=1..30.

Crossrefs

Cf. A287879.

Sequence in context: A100462 A161637 A329969 * A337016 A148721 A148722

Adjacent sequences: A287877 A287878 A287879 * A287881 A287882 A287883

Keyword

nonn

Author

N. J. A. Sloane, Jun 18 2017

Status

approved