

A274079


Table read by rows: the nth row is the list of numbers diagonally up and to the right of n in the natural numbers read by antidiagonals.


5



2, 4, 5, 4, 7, 8, 7, 9, 8, 7, 11, 12, 11, 13, 12, 11, 14, 13, 12, 11, 16, 17, 16, 18, 17, 16, 19, 18, 17, 16, 20, 19, 18, 17, 16, 22, 23, 22, 24, 23, 22, 25, 24, 23, 22, 26, 25, 24, 23, 22, 27, 26, 25, 24, 23, 22, 29, 30, 29, 31, 30, 29, 32, 31, 30, 29, 33, 32
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS

Peter Kagey, Table of n, a(n) for n = 1..10000


EXAMPLE

A000027 read by antidiagonals is:
1 2 4 7
3 5 8
6 9
...
Thus:
Row 1: []
Row 2: []
Row 3: [2]
Row 4: []
Row 5: [4]
Row 6: [5, 4]
Row 7: []
Row 8: [7]
Row 9: [8, 7]


MATHEMATICA

Table[Reverse@ Range[SelectFirst[Reverse@ #, # < n &] + 1, n  1]  1, {n, 2, 35}] &[Accumulate@ Range[0, 15] + 1] // Flatten (* Michael De Vlieger, Jun 10 2016, Version 10 *)


PROG

(Haskell)
a274079 n = a274079_list !! (n  1)
a274079_list = concatMap a274079_row [1..]
a274079_tabf = map a274079_row [1..]
a274079_row n = [n1, n2..n  a002262 (n  1)]


CROSSREFS

Cf. A000027, A269526, A273823, A273824, A273825, A274080.
Sequence in context: A070784 A200289 A165044 * A296372 A278300 A034214
Adjacent sequences: A274076 A274077 A274078 * A274080 A274081 A274082


KEYWORD

nonn,tabf


AUTHOR

Peter Kagey, Jun 09 2016


STATUS

approved



