OFFSET
2,2
COMMENTS
a(11) = 188829168009674568016545. - Seiichi Manyama, Apr 07 2020
EXAMPLE
a(2) = 1;
+--*
| |
+--*
a(3) = 4;
+--*--* +--*--* +--* +--*
| | | | | | | |
* * * *--* * *--* * *
| | | | | | | |
+--*--* +--* +--*--* +--*
PROG
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Seiichi Manyama, Mar 23 2020
STATUS
approved