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A029584 Expansion of cos x + tan x + sec x. 1
2, 1, 0, 2, 6, 16, 60, 272, 1386, 7936, 50520, 353792, 2702766, 22368256, 199360980, 1903757312, 19391512146, 209865342976, 2404879675440, 29088885112832, 370371188237526, 4951498053124096, 69348874393137900 (list; graph; refs; listen; history; text; internal format)
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: A267072 A070677 A269339 * A266878 A199469 A266832

Adjacent sequences:  A029581 A029582 A029583 * A029585 A029586 A029587

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 20 10:37 EST 2018. Contains 299385 sequences. (Running on oeis4.)