A246773 Decimal expansion of 'v', an auxiliary constant associated with the asymptotic number of row-convex polyominoes.

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

Offset

1,1

Comments

Essentially the same digit sequence as A137421. - R. J. Mathar, Sep 06 2014

Links

Table of n, a(n) for n=1..104.

Steven R. Finch, Errata and Addenda to Mathematical Constants. p. 48.

Formula

v = first root of x^3 - 5*x^2 + 7*x - 4 = (x-2)^3+(x-2)^2-(x-2)-2.

A001169(n) ~ u*v^n, where u = A246772.

Example

3.20556943040059031170202861778382342637710891959769944...

Mathematica

v = Root[x^3 - 5*x^2 + 7*x - 4, x, 1]; RealDigits[v, 10, 104] // First

Crossrefs

Cf. A001169, A006958, A067675, A246772.

Sequence in context: A308179 A086800 A326296 * A359843 A364361 A338022

Adjacent sequences: A246770 A246771 A246772 * A246774 A246775 A246776

Keyword

nonn,cons,easy

Author

Jean-François Alcover, Sep 03 2014

Status

approved