A285204 -id:A285204 - cp's OEIS frontend

A285202 A285200 displayed as an irregular triangle read by rows.

1, 1, 2, 1, 1, 2, 3, 2, 1, 1, 2, 3, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1, 1, 2, 3, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 2, 1, 1, 2, 3, 4, 5, 4, 3, 2, 1

Offset: 0

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N. J. A. Sloane, May 03 2017

nonn
tabf

This is Ken Knowlton's elevator sequence A285200, but with an extra 1 each time the elevator returns to (or starts at) the first floor.

Row lengths are A285204. The row maxima are given in A285203 (for n>0).

			Triangle begins:
1,
1, 2, 1,
1, 2, 3, 2, 1,
1, 2, 3, 2, 1,
1, 2, 3, 4, 3, 2, 1,
1, 2, 3, 2, 1,
1, 2, 3, 4, 3, 2, 1,
1, 2, 3, 2, 1,
1, 2, 3, 4, 3, 2, 1,
1, 2, 3, 2, 1,
1, 2, 3, 4, 5, 4, 3, 2, 1,
...

Cf. A285200, A285201, A285203, A285204.

cp's OEIS Frontend

A285202 A285200 displayed as an irregular triangle read by rows.

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