|
Search: id:A006229
|
|
|
| A006229 |
|
Expansion of exp( tan x ).
(Formerly M2822)
|
|
+0
6
|
|
| 1, 1, 1, 3, 9, 37, 177, 959, 6097, 41641, 325249, 2693691, 24807321, 241586893, 2558036145, 28607094455, 342232522657, 4315903789009, 57569080467073, 807258131578995, 11879658510739497, 183184249105857781
(list; graph; listen)
|
|
|
OFFSET
|
0,4
|
|
|
REFERENCES
|
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 259, Sum_{k} T(n,k).
CRC Standard Mathematical Tables and Formulae, 30th ed. 1996, p. 42.
L. B. W. Jolley, Summation of Series. 2nd ed., Dover, NY, 1961, p. 150.
|
|
LINKS
|
T. D. Noe, Table of n, a(n) for n=0..100
|
|
FORMULA
|
E.g.f.: exp(tan(x)).
|
|
CROSSREFS
|
Cf. A003711, A003717.
Cf. A047691, A047692. Row sums of A059419 and unsigned A111593.
Sequence in context: A002751 A119856 A077365 this_sequence A008986 A105215 A158053
Adjacent sequences: A006226 A006227 A006228 this_sequence A006230 A006231 A006232
|
|
KEYWORD
|
nonn,easy,nice
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com), Jeffrey Shallit
|
|
EXTENSIONS
|
More terms from Larry Reeves (larryr(AT)acm.org), Feb 08 2001
|
|
|
Search completed in 0.002 seconds
|
