OFFSET
1,3
COMMENTS
LINKS
Rémy Sigrist, Table of n, a(n) for n = 1..5050
Rémy Sigrist, PARI program for A289905
EXAMPLE
The table begins:
x\y: 1 2 3 4 5 6 7 8 ...
1: 0 2 6 18 54 8 162 486 ...
2: 1 -1 7 -1 19 -1 55 -1 ...
3: 3 5 -1 21 57 -1 165 489 ...
4: 9 -1 15 -1 63 -1 171 -1 ...
5: 27 11 33 45 -1 17 189 513 ...
6: 4 -1 -1 -1 22 -1 58 -1 ...
7: 81 29 87 99 135 35 -1 567 ...
8: 243 -1 249 -1 297 -1 405 -1 ...
...
PROG
(PARI) \\ See Links section.
CROSSREFS
KEYWORD
AUTHOR
Rémy Sigrist, Jul 14 2017
STATUS
approved