OFFSET
0,34
COMMENTS
In other words, a(n) is the number of ways to write n as the sum of two anagrams.
Leading zeros are ignored.
LINKS
Rémy Sigrist, Table of n, a(n) for n = 0..20000
Rémy Sigrist, PARI program for A331218
Rémy Sigrist, Scatterplot of (x, y) such that 0 <= x, y <= 10^3 and x and y are decimal anagrams (a(n) corresponds to the number of pixels (x, y) such that x+y = n)
EXAMPLE
For n = 44:
- we have the following ways to write 44 as a sum of two anagrams:
u v
-- --
13 31
22 22
31 13
- hence a(44) = 3.
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Rémy Sigrist, Jan 12 2020
STATUS
approved