

A096105


Numbers such that every digit is a multiple of the digit to its left.


2



1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 26, 28, 30, 33, 36, 39, 40, 44, 48, 50, 55, 60, 66, 70, 77, 80, 88, 90, 99, 100, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 122, 124, 126, 128, 130, 133, 136, 139, 140, 144, 148
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OFFSET

1,2


COMMENTS

The number of ndigit terms is (n^4+22n^3+95n^2+98n)/24.  David Wasserman


LINKS

Robert Israel, Table of n, a(n) for n = 1..10000


MAPLE

for i from 1 to 9 do g(i):= [seq(t, t=0..9, i)] od: g(0):= [0]:
A[1]:= [$1..9]:
for d from 2 to 4 do A[d]:= map(t > op(10*t+~g(t mod 10)), A[d1]) od:
map(op, [seq(A[d], d=1..4)]); # Robert Israel, Sep 01 2019


CROSSREFS

Cf. A096106.
Sequence in context: A247756 A032520 A034837 * A178157 A246083 A246090
Adjacent sequences: A096102 A096103 A096104 * A096106 A096107 A096108


KEYWORD

base,easy,nonn


AUTHOR

Amarnath Murthy, Jun 26 2004


EXTENSIONS

Edited by David Wasserman, Dec 28 2005


STATUS

approved



