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

1,2

Comments

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

Links

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

Formula

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

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

Example

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

Prog

(define (A220662 n) (1+ (A084555 (-1+ (A084557 n)))))

Crossrefs

Cf. A220663, A220660, A030298.

Sequence in context: A250983 A070320 A124195 * A079584 A179291 A004079

Adjacent sequences: A220659 A220660 A220661 * A220663 A220664 A220665

Keyword

nonn,tabf

Author

Antti Karttunen, Dec 18 2012

Status

approved