A085938 a(n) is the (n+1)-digit number in which the first digit is 1 and the subsequent digits increase by steps of n (mod 10).

12, 135, 1470, 15937, 161616, 1739517, 18529630, 197531975, 1098765432, 11111111111, 123456789012, 1357913579135, 14703692581470, 159371593715937, 1616161616161616, 17395173951739517, 185296307418529630

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Example

a(4) = 15937, 5 = 1+4, 9 = 5+4, 9+4 = 13 gives the next digit 3, 3+4 = 7 is the least significant digit.

Prog

(PARI) a(n) = sum(i = 0, n, (1 + i*n)%10*10^(n - i)) \\ David Wasserman, Feb 14 2005

Crossrefs

Sequence in context: A208440 A218762 A199233 * A161124 A288035 A290474

Adjacent sequences: A085935 A085936 A085937 * A085939 A085940 A085941

Keyword

base,easy,nonn

Author

Jason Earls and Amarnath Murthy, Jul 14 2003

Extensions

More terms from David Wasserman, Feb 14 2005

Offset changed to 1 by Georg Fischer, Jan 29 2022

Status

approved