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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A166494 Irregular triangle T(n,k) = greatest common divisor of n-th row terms of A143753. 2 3, 8, 5, 5, 12, 12, 7, 7, 7, 16, 16, 16, 9, 9, 9, 9, 20, 20, 20, 20, 11, 11, 11, 11, 11, 24, 24, 24, 24, 24, 13, 13, 13, 13, 13, 13, 28, 28, 28, 28, 28, 28, 15, 15, 15, 15, 15, 15, 15, 32, 32, 32, 32, 32, 32, 32, 17, 17, 17, 17, 17, 17, 17, 17, 36, 36, 36, 36, 36, 36, 36, 36, 19, 19, 19, 19, 19, 19, 19, 19, 19, 40, 40, 40, 40, 40, 40, 40, 40, 40, 21, 21, 21, 21, 21, 21, 21, 21 (list; graph; refs; listen; history; text; internal format) OFFSET 1,1 LINKS Table of n, a(n) for n=1..98. FORMULA T(n,k) = A022998(n+2). EXAMPLE 3; 8; 5,5; 12,12; 7,7,7; 16,16,16; CROSSREFS Cf. A166866. Sequence in context: A200699 A113813 A110944 * A140392 A140385 A078361 Adjacent sequences: A166491 A166492 A166493 * A166495 A166496 A166497 KEYWORD nonn,tabf,easy AUTHOR Paul Curtz, Oct 15 2009 STATUS approved

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Last modified August 18 17:33 EDT 2024. Contains 375269 sequences. (Running on oeis4.)