A136372 Prime factors of terms of A127263.

3, 19, 571, 9137, 41113, 174763, 274081, 1236787, 7485811, 23474953, 34630009, 47822393, 69171211, 92346689, 160465489

Offset: 1

Author

Alexander Adamchuk, Dec 27 2007

Keywords

• nonn
• hard
• more

Comments

From Alexander Adamchuk, May 14 2010: (Start)

3 divides A127263(n) for n > 1.

19 divides A127263(n) for n > 2. (End)

Examples

			A127263(1) = 1,
A127263(2) = 3,
A127263(3) = 57 = 3*19,
A127263(4) = 32547 = 3*19*571,
A127263(5) = 9961491 = 3*19*174763,
A127263(6) = 297381939 = 3*19*571*9137.
		

Crossrefs

Cf. A127263, A128677, A128678, A128679, A128680, A128681, A128682, A128683, A128684, A128685, A136373.

Cf. A177813, A177814, A177816, A177817, A177818, A177819, A177820. - Alexander Adamchuk, May 14 2010

Extensions

Edited and extended by Max Alekseyev, May 14 2010