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 A079774 Consider the triangle shown below in which the n-th row contains the n smallest terms in increasing order having a common factor > 1, the first term being the n-th composite number; sequence gives the last term of each row. 2

%I

%S 4,8,12,18,18,22,26,36,32,36,40,54,46,50,95,56,75,62,66,70,93,76,145,

%T 82,86,114,92,96,100,132,106,110,273,116,153,122,126,240,132,174,138,

%U 142,146,192,152,290,158,162,213,168,172,176,231,182,455,188,192,252

%N Consider the triangle shown below in which the n-th row contains the n smallest terms in increasing order having a common factor > 1, the first term being the n-th composite number; sequence gives the last term of each row.

%C 4

%C 6 8

%C 8 10 12

%C 9 12 15 18

%C 10 12 14 16 18

%C 12 14 16 18 20 22

%C ...

%Y Cf. A079775, A079776.

%K nonn

%O 1,1

%A _Amarnath Murthy_, Jan 31 2003

%E Corrected and extended by _Frank Ellermann_, Jul 11 2003

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Last modified November 27 14:32 EST 2022. Contains 358405 sequences. (Running on oeis4.)