A110748 Form triangle shown below, in which the n-th row contains n terms of an arithmetic progression with first term 1 and common difference n. Then a(n) = terms of the n-th row (mod 10), concatenated.

1, 13, 147, 1593, 16161, 173951, 1852963, 19753197, 109876543, 1111111111, 12345678901, 135791357913, 1470369258147, 15937159371593, 161616161616161, 1739517395173951, 18529630741852963, 197531975319753197

Offset

1,2

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Example

1
1 3
1 4 7
1 5 9 13
1 6 11 16 21
...

Mathematica

Table[FromDigits[Mod[Range[1, n^2-n+1, n], 10]], {n, 20}] (* Harvey P. Dale, Mar 11 2018 *)

Crossrefs

Sequence in context: A048442 A353107 A051524 * A211072 A016135 A332691

Adjacent sequences: A110745 A110746 A110747 * A110749 A110750 A110751

Keyword

base,nonn

Author

Amarnath Murthy, Aug 10 2005

Extensions

More terms from Melissa Ciacchi (mciacchi(AT)ashland.edu), Feb 28 2006

Status

approved