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A220661 Irregular table, where the n-th row consists of numbers 1..n! 3
1, 1, 2, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

A. Karttunen, The rows 1..7 of the irregular table, flattened.

FORMULA

a(n) = n - A007489(A084556(n)-1).

a(n) = A220660(n)+1.

EXAMPLE

Rows of this irregular table begin as:

1;

1, 2;

1, 2, 3, 4, 5, 6;

MATHEMATICA

Flatten[Range[#]&/@(Range[5]!)] (* Harvey P. Dale, Apr 20 2013 *)

PROG

(Scheme): (define (A220661 n) (- n (A007489 (-1+ (A084556 n)))))

CROSSREFS

Cf. A000142, A220660.

Sequence in context: A309932 A058886 A236858 * A137846 A080915 A239484

Adjacent sequences:  A220658 A220659 A220660 * A220662 A220663 A220664

KEYWORD

nonn,tabf

AUTHOR

Antti Karttunen, Dec 18 2012

STATUS

approved

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Last modified July 8 01:48 EDT 2020. Contains 335502 sequences. (Running on oeis4.)