A165770 - OEIS

A165770

Smallest divisor of 123...n (=A007908) larger than the preceding term.

1, 2, 3, 617, 823, 1286, 9721, 14593, 32463, 1234567891, 1417414341, 2110805449, 98220894641, 205761315168520219, 8230452606740808761, 3086419727527803285379, 8755800645468945490437, 70708355728013820970883

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OFFSET

1,2

COMMENTS

Inspired by Layman's comment on a sequence from Angelini, cf. link.

LINKS

Table of n, a(n) for n=1..18.

John W. Layman, Re: Sum divides concatenation, SeqFan list, Sep 30 2009.

PROG

(PARI) c=""; s=0; for(i=1, 19, fordiv(c=eval(Str(c, i)), d, d>s || next; print1(s=d, ", "); break))

CROSSREFS

Cf. A151995.

Sequence in context: A004887 A240709 A264577 * A226148 A108332 A256115

Adjacent sequences: A165767 A165768 A165769 * A165771 A165772 A165773

KEYWORD

nonn,base

AUTHOR

M. F. Hasler, Sep 30 2009

EXTENSIONS

Edited by Charles R Greathouse IV, Apr 24 2010

STATUS

approved