OFFSET
1,2
COMMENTS
FORMULA
a(n) = (sqrt(1 + 8*A068808(n)) - 1)/2. - Jon E. Schoenfield, Dec 30 2023
MAPLE
dig := X->convert((convert(X, base, 10)), `+`); T := k->k*(k+1)/2; S := k->seq(dig(T(i)), i=1..k-1); seq(`if`(dig(T(i))>max(S(i)), i, printf("")), i=1..600);
CROSSREFS
KEYWORD
nonn
AUTHOR
Francois Jooste (phukraut(AT)hotmail.com), Mar 10 2002
EXTENSIONS
Better name and more terms from Jon E. Schoenfield, Dec 30 2023
STATUS
approved