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

1,5

Comments

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

Links

Table of n, a(n) for n=1..76.

Example

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

Crossrefs

Sequence in context: A359169 A096462 A348507 * A064265 A180595 A088401

Adjacent sequences: A066945 A066946 A066947 * A066949 A066950 A066951

Keyword

easy,nonn,tabf

Author

Naohiro Nomoto, Jan 25 2002

Extensions

Extended by David Wasserman, Dec 04 2002

Status

approved