A110748 - OEIS

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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

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

(list; graph; refs; listen; history; text; internal format)

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