OFFSET
1,1
LINKS
Scott R. Shannon, Table of n, a(n) for n = 1..10000
EXAMPLE
23 is a term as there is no number p such that p - 23 = sopfr(p) + sopfr(23) and there is no number q such that q - 23 = sopfr(q) + sopfr(23).
4 is not a term as 16 - 4 = 12 and sopfr(16) + sopfr(4) = 8 + 4 = 12. Therefor 16 is not a term either.
CROSSREFS
KEYWORD
nonn
AUTHOR
Scott R. Shannon, Jan 21 2024
STATUS
approved