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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: A014881 A048442 A051524 * A211072 A016135 A210165 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

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Last modified January 21 05:39 EST 2020. Contains 331104 sequences. (Running on oeis4.)