OFFSET
1,2
COMMENTS
Composite numbers m for which a(m) = 0 are in A349865.
FORMULA
If p prime >= 11, a(p) = 0.
EXAMPLE
a(10) = 32 since 2*(2+3) = 10 and no integer du < 32 gives u*(u+d) = 32.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Bernard Schott, Dec 03 2021
EXTENSIONS
a(64) and a(81) corrected by Michel Marcus, Dec 03 2021.
STATUS
approved