A098734 Consider the sequence {b(n), n >= 1} of digits of the integers: 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0... (A033307); a(n) = n*b(n).

0, 2, 6, 12, 20, 30, 42, 56, 72, 90, 11, 0, 13, 14, 15, 32, 17, 54, 19, 80, 21, 110, 23, 144, 25, 182, 27, 224, 29, 270, 62, 0, 66, 34, 70, 72, 74, 114, 78, 160, 82, 210, 86, 264, 90, 322, 94, 384, 98, 450, 153, 0, 159, 54, 165, 112, 171, 174, 177, 240, 183, 310, 189, 384

Offset: 1

Author

Alexandre Wajnberg, Sep 30 2004

Keywords

• base
• easy
• nonn

Crossrefs

Cf. A098727, etc.

Extensions

More terms from Emeric Deutsch, Jul 13 2005