A066948 Triangle of prime signature of A007870(n), read by rows.

0, 1, 1, 1, 5, 1, 6, 2, 1, 13, 5, 1, 18, 7, 2, 1, 36, 11, 3, 1, 48, 20, 5, 2, 79, 28, 9, 3, 109, 42, 13, 5, 1, 170, 64, 19, 7, 1, 230, 90, 28, 11, 2, 1, 337, 127, 40, 17, 3, 1, 453, 181, 58, 24, 5, 2, 648, 247, 80, 34, 7, 3, 859, 338, 111, 48, 11, 5, 1, 1185, 465, 151, 66, 15, 7, 1

Offset: 1

Author

Naohiro Nomoto, Jan 25 2002

Keywords

• easy
• nonn
• tabf

Comments

Lengths of rows are 1 2 2 3 3 4 4 4 4 5 5 6 6 .... (A000720).

Examples

			0.1.1.5.6.13.18.36.48.79...etc
....1.1.2..5..7.11.20.28...etc
........1..1..2..3..5..9...etc
..............1..1..2..3...etc
		

Extensions

Extended by David Wasserman, Dec 04 2002