

A280919


Precipices from the successive terraces, descending by the main diagonal of the pyramid described in A245092. Also first differences of A071562.


11



1, 2, 2, 2, 1, 3, 3, 1, 2, 2, 4, 1, 3, 2, 2, 3, 1, 4, 2, 3, 3, 1, 1, 4, 2, 4, 3, 1, 2, 4, 2, 5, 3, 1, 3, 4, 2, 1, 5, 2, 1, 1, 4, 4, 2, 2, 5, 3, 1, 5, 2, 2, 2, 3, 5, 3, 1, 6, 3, 1, 2, 4, 2, 3, 3, 1, 1, 6, 4, 2, 5, 3, 2, 3, 1, 2, 2, 4, 4, 1, 1, 6, 4, 1, 3, 1, 3
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


COMMENTS

Descending by the main diagonal of the pyramid, A071562 gives the levels where we can find a terrace.
The terraces at the kth level of the pyramid are also the parts of the symmetric representation of sigma(k).
a(n) is the length of the nth vertical line segment at the main diagonal of the pyramid.
a(n) is the precipice of A071562(n).
The structure of the stepped pyramid arises after the 90degreezigzag folding of the diagram of the isosceles triangle A237593.
The stepped pyramid is also one of the 3Dquadrants of the stepped pyramid described in A244050.


LINKS



FORMULA



MATHEMATICA



CROSSREFS

Cf. A000203, A071562, A196020, A235791, A236104, A237048, A237591, A237593, A237270, A237271, A244050, A245092, A259179, A262626.


KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



