A137152 Triangle read by rows: prime powers whose row products give A051451.

1, 1, 2, 1, 2, 3, 1, 1, 3, 4, 1, 1, 3, 4, 5, 1, 1, 3, 4, 5, 7, 1, 1, 3, 1, 5, 7, 8, 1, 1, 1, 1, 5, 7, 8, 9, 1, 1, 1, 1, 5, 7, 8, 9, 11, 1, 1, 1, 1, 5, 7, 8, 9, 11, 13, 1, 1, 1, 1, 5, 7, 1, 9, 11, 13, 16, 1, 1, 1, 1, 5, 7, 1, 9, 11, 13, 16, 17, 1, 1, 1, 1, 5, 7, 1, 9, 11, 13, 16, 17, 19, 1, 1, 1, 1, 5, 7, 1

Offset: 1

Author

Mats Granvik, Jan 24 2008

Keywords

• nonn
• tabl

Comments

Similar to tables A133232 and A133233.

Examples

			The least common multiple of the first few rows are:
lcm{1} = 1
lcm{1,2} = 2
lcm{1,2,3} = 6
lcm{1,1,3,4} = 12
lcm{1,1,3,4,5} = 60
lcm{1,1,3,4,5,7} = 420
lcm{1,1,3,1,5,7,8} = 840
lcm{1,1,1,1,5,7,8,9} = 2520
lcm{1,1,1,1,5,7,8,9,11} = 27720
Multiplying the terms in the rows produces the same result:
1 = 1
1*2 = 2
1*2*3 = 6
1*1*3*4 = 12
1*1*3*4*5 = 60
1*1*3*4*5*7 = 420
1*1*3*1*5*7*8 = 840
1*1*1*1*5*7*8*9 = 2520
1*1*1*1*5*7*8*9*11 = 27720
		

Crossrefs

Cf. A051451.