A029584 Expansion of cos x + tan x + sec x.

2, 1, 0, 2, 6, 16, 60, 272, 1386, 7936, 50520, 353792, 2702766, 22368256, 199360980, 1903757312, 19391512146, 209865342976, 2404879675440, 29088885112832, 370371188237526, 4951498053124096, 69348874393137900

Offset

0,1

Comments

a(2n) = 2*A012007(n), a(2n+1) = A000182(n+1).

Links

Table of n, a(n) for n=0..22.

Crossrefs

Sequence in context: A269339 A300192 A366554 * A318931 A266878 A339780

Adjacent sequences: A029581 A029582 A029583 * A029585 A029586 A029587

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved