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

Author

Jean-François Alcover, Sep 03 2014

Keywords

• nonn
• cons
• easy

Comments

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

Examples

			3.20556943040059031170202861778382342637710891959769944...
		

Links

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

Crossrefs

Cf. A001169, A006958, A067675, A246772.

Programs

Mathematica

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

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.