OFFSET
1,1
COMMENTS
Subset of A105417.
EXAMPLE
a(1) = 1444 because written in Roman numeral it is MCDXLIV, using each of the symbols I, V, X, L, C, D and M exactly once.
PROG
(PARI) A105416=vector(8, n, n--+722+n\2*8+n\4*80)*2 \\ M. F. Hasler, Jul 10 2018
CROSSREFS
KEYWORD
base,fini,full,nonn
AUTHOR
Robert Happelberg (roberthappelberg(AT)yahoo.com), Apr 06 2005
STATUS
approved