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A368195
a(n) is the number of numbers that can be obtained by replacing any positive number without leading zeros, say m, appearing in the decimal expansion of n by one of the divisors of m.
4
1, 2, 2, 3, 2, 4, 2, 4, 3, 4, 2, 7, 3, 6, 5, 8, 3, 9, 4, 6, 5, 6, 4, 11, 5, 8, 6, 10, 5, 8, 3, 8, 6, 7, 6, 13, 4, 8, 7, 8, 4, 11, 5, 10, 8, 9, 5, 15, 7, 6, 5, 8, 4, 11, 6, 12, 6, 8, 5, 12, 5, 8, 10, 12, 8, 14, 6, 12, 9, 8, 3, 13, 4, 7, 7, 10, 6, 12, 5, 10, 8
OFFSET
1,2
COMMENTS
a(n) gives the number of terms in the n-th row of A368194.
FORMULA
a(n) >= A000005(n).
EXAMPLE
For n = 42: the 42nd row of A368194 contains 11 terms (1, 2, 3, 6, 7, 12, 14, 21, 22, 41, 42), so a(42) = 11.
PROG
(PARI) See Links section.
CROSSREFS
Cf. A000005, A368194, A368314 (binary variant).
Sequence in context: A302051 A334080 A066800 * A218705 A193459 A114102
KEYWORD
nonn,base
AUTHOR
Rémy Sigrist, Dec 16 2023
STATUS
approved