A110797 - OEIS

A110797

a(0) = 1, a(1) = 2; then all the products generated by these numbers, then the next number 3 and so on.

1, 2, 3, 6, 4, 8, 12, 24, 5, 10, 15, 20, 30, 40, 60, 120, 6, 12, 18, 24, 30, 36, 48, 60, 72, 90, 120, 144, 180, 240, 360, 720, 7, 14, 21, 28, 35, 42, 42, 56, 70, 84, 84, 105, 126, 140, 168, 168, 210, 210, 252, 280, 336, 420, 420, 504, 630, 840, 840, 1008, 1260, 1680

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OFFSET

0,2

COMMENTS

a(2^n) = n+2.

Differs from A083872 starting at a(16)=6.

"All the products generated by these numbers" means "the product of the most recently added singleton with each of the previous terms, sorted by size." - Joel B. Lewis, Nov 15 2006

LINKS

Ivan Neretin, Table of n, a(n) for n = 0..1023

MATHEMATICA

a = {1, 2}; Do[a = Join[a, Sort[n*a]], {n, 3, 7}]; a (* Ivan Neretin, May 09 2015 *)

CROSSREFS

Sequence in context: A212486 A127562 A096113 * A083872 A121663 A096112

Adjacent sequences: A110794 A110795 A110796 * A110798 A110799 A110800

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Aug 13 2005

EXTENSIONS

Extended by Ray Chandler, Aug 23 2005

STATUS

approved