A163032 Number of n X 6 binary arrays with all 1s connected and a path of 1s from top row to bottom row.
21, 639, 27651, 1111283, 42972329, 1642690309, 62618577481, 2385542862643, 90870669971589, 3461426734215747, 131852221160935917, 5022507165784282263, 191317198008071782069, 7287650933960562176059, 277601073047629123048799, 10574375404737019213183521
Offset: 1
Keywords
Links
- Andrew Howroyd, Table of n, a(n) for n = 1..200
- Chaim Goodman-Strauss, Notes on the number of m × n binary arrays with all 1’s connected and a path of 1’s from top row to bottom row (May 21 2020)
- Chaim Goodman-Strauss, Mma notebook to accompany the above document
Formula
For a formula see the Goodman-Strauss links. - N. J. A. Sloane, May 22 2020
Extensions
Terms a(11) and beyond from Andrew Howroyd, Jan 06 2023