OFFSET
0,3
COMMENTS
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 0..10000
EXAMPLE
. ---+---------+-------------+----+-------------------------------------
. 2 | 10 | [0,1,2] | 8 = #{(0,0,0), (0,1,0), (0,2,0), (1,0,0),
. | | | (2,0,0), (1,1,1), (1,2,2), (2,1,2)}
. 3 | 11 | [1,3] | 3 = #{(1,1,1), (1,3,3), (3,1,3)}
. 4 | 100 | [0,1,2,4] | 13 = #{(0,0,0), (0,1,0), (0,2,0), (0,4,0),
. | | | (1,0,0), (2,0,0), (4,0,0), (1,1,1),
. | | | (1,2,2), (2,1,2), (1,4,4), (2,2,4),
. | | | (4,1,4)}
. 5 | 101 | [0,1,2,5] | 12 = #{(0,0,0), (0,1,0), (0,2,0), (0,5,0),
. | | | (1,0,0), (2,0,0), (5,0,0), (1,1,1),
. | | | (1,2,2), (2,1,2), (1,5,5), (5,1,5)}
. 6 | 110 | [0,1,2,3,6] | 18 = #{(0,0,0), (0,1,0), (0,2,0), (0,3,0),
. | | | (0,6,0), (1,0,0), (2,0,0), (3,0,0),
. | | | (6,0,0), (1,1,1), (1,2,2), (2,1,2),
. | | | (1,3,3), (3,1,3), (1,6,6), (2,3,6),
. | | | (3,2,6), (6,1,6)}
. 7 | 111 | [1,3,7] |≈ 5 = #{(1,1,1), (1,3,3), (3,1,3), (1,7,7),
. | | | (7,1,7)} .
PROG
(Haskell)
a265236 n = length [() | let cs = a119709_row n, a <- cs, b <- cs, c <- cs,
a * b == c || c == 0 && a * b == 0]
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Dec 06 2015
EXTENSIONS
Suggested by N. J. A. Sloane.
STATUS
approved