A165771 Smallest positive integer such that a(1)+...a(n) divides 123...n (=A007908(n)).

1, 1, 1, 614, 206, 463, 8435, 4872, 17870, 1234535428, 182846450, 693391108, 96110089192, 205761216947625578, 8024691291572288542, 3078189274921062476618, 5669380917941142205058, 61952555082544875480446

Offset: 1

Author

M. F. Hasler, Sep 30 2009

Keywords

• nonn
• base

Comments

Without the initial term, these are the first differences of A165770.

Links

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

Crossrefs

Cf. A151995, A165770, A166064.

Programs

PARI

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

Extensions

Edited by Charles R Greathouse IV, Apr 24 2010