OFFSET
1,4
COMMENTS
Paths of length zero are not counted here.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..435
Eric Weisstein's World of Mathematics, Grid Graph.
Wikipedia, Induced path.
EXAMPLE
Array begins:
============================================================
m\n| 1 2 3 4 5 6 7 8 ...
---+--------------------------------------------------------
1 | 0 1 3 6 10 15 21 28 ...
2 | 1 8 25 58 117 218 387 666 ...
3 | 3 25 94 270 681 1597 3592 7880 ...
4 | 6 58 270 1004 3330 10224 29924 85036 ...
5 | 10 117 681 3330 14864 61165 238897 907148 ...
6 | 15 218 1597 10224 61165 334536 1723535 8647932 ...
7 | 21 387 3592 29924 238897 1723535 11546874 75134416 ...
8 | 28 666 7880 85036 907148 8647932 75134416 629381852 ...
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Andrew Howroyd, Jan 29 2023
STATUS
approved