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A059368 Triangle arising from solution to a*x = tan x (next row contains non-integral entries). 0
1, 1, 3, 3, 20, 30, 15, 161, 525, 525, 105, 1584, 8232, 17640, 13230, 945, 18579, 134970, 457380, 727650, 436590 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 170, #33.

LINKS

Table of n, a(n) for n=0..20.

EXAMPLE

    1;

    1,    3;

    3,   20,   30;

   15,  161,  525,   525;

  105, 1584, 8232, 17640, 13230; ...

CROSSREFS

First diagonal is A001147.

Sequence in context: A101617 A131443 A157050 * A090694 A078431 A292953

Adjacent sequences:  A059365 A059366 A059367 * A059369 A059370 A059371

KEYWORD

nonn,tabl,fini,full

AUTHOR

N. J. A. Sloane, Jan 28 2001

STATUS

approved

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Last modified February 21 19:50 EST 2018. Contains 299423 sequences. (Running on oeis4.)