A220662 Irregular table: row n (n>=1) consists of A084556(n) copies of A130664(n).

1, 2, 2, 4, 4, 6, 6, 6, 9, 9, 9, 12, 12, 12, 15, 15, 15, 18, 18, 18, 21, 21, 21, 24, 24, 24, 24, 28, 28, 28, 28, 32, 32, 32, 32, 36, 36, 36, 36, 40, 40, 40, 40, 44, 44, 44, 44, 48, 48, 48, 48, 52, 52, 52, 52, 56, 56, 56, 56, 60, 60, 60, 60, 64, 64, 64, 64, 68

Offset: 1

Author

Antti Karttunen, Dec 18 2012

Keywords

• nonn
• tabf

Comments

The term a(n) gives the position of the first term in A030298 which belongs to the same permutation as A030298(n) itself.

Examples

			Rows of this irregular table begin as:
1;
2, 2;
4, 4;
6, 6, 6;
9, 9, 9;
		

Links

• A. Karttunen, Rows 1..998 of the irregular table, flattened.

Crossrefs

Cf. A220663, A220660, A030298.

Formula

a(n) = A130664(A084557(n)) = A084555(A084557(n)-1)+1.

a(A130664(n)) = A130664(n).