A381473 Decimal expansion of the smallest positive solution to 2*x = tan(x).

1, 1, 6, 5, 5, 6, 1, 1, 8, 5, 2, 0, 7, 2, 1, 1, 3, 0, 6, 8, 3, 3, 9, 1, 7, 9, 7, 7, 9, 5, 8, 5, 6, 0, 6, 6, 9, 1, 3, 4, 5, 3, 8, 8, 4, 7, 6, 9, 3, 0, 5, 7, 2, 8, 7, 5, 5, 4, 8, 6, 8, 6, 4, 6, 6, 9, 6, 6, 1, 5, 4, 0, 8, 7, 1, 6, 3, 5, 8, 3, 3, 6, 9, 2, 1, 0, 7, 7, 1, 2, 8, 5, 5, 2, 1, 9, 6, 5, 0, 7, 0, 4, 3, 7, 2, 9, 6, 7

Offset

1,3

Links

Table of n, a(n) for n=1..108.

Index entries for transcendental numbers.

Formula

Equals A257451 / 2.

Example

1.1655611852072113068339179779585606691...

Mathematica

RealDigits[x /. FindRoot[2*x - Tan[x], {x, 1}, WorkingPrecision -> 120]][[1]] (* Amiram Eldar, Apr 13 2026 *)

Prog

(PARI) solve(x=1, 1.5, 2*x-tan(x))

Crossrefs

Cf. A257451.

Sequence in context: A382242 A199600 A396445 * A021608 A108088 A137727

Adjacent sequences: A381470 A381471 A381472 * A381474 A381475 A381476

Keyword

nonn,cons

Author

Andrew Howroyd, Mar 10 2025

Status

approved