

A245093


Triangle read by rows in which row n lists the first n terms of A000203.


6



1, 1, 3, 1, 3, 4, 1, 3, 4, 7, 1, 3, 4, 7, 6, 1, 3, 4, 7, 6, 12, 1, 3, 4, 7, 6, 12, 8, 1, 3, 4, 7, 6, 12, 8, 15, 1, 3, 4, 7, 6, 12, 8, 15, 13, 1, 3, 4, 7, 6, 12, 8, 15, 13, 18, 1, 3, 4, 7, 6, 12, 8, 15, 13, 18, 12, 1, 3, 4, 7, 6, 12, 8, 15, 13, 18, 12, 28
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,3


COMMENTS

Reluctant sequence of A000203.
Row sums give A024916.
Has a symmetric representation  for more information see A237270.


LINKS

Reinhard Zumkeller, Rows n = 1..125 of triangle, flattened


FORMULA

T(n,k) = A000203(k), 1<=k<=n.


EXAMPLE

Triangle begins:
1;
1, 3;
1, 3, 4;
1, 3, 4, 7;
1, 3, 4, 7, 6;
1, 3, 4, 7, 6, 12;
1, 3, 4, 7, 6, 12, 8;
1, 3, 4, 7, 6, 12, 8, 15;
1, 3, 4, 7, 6, 12, 8, 15, 13;
1, 3, 4, 7, 6, 12, 8, 15, 13, 18;
1, 3, 4, 7, 6, 12, 8, 15, 13, 18, 12;
1, 3, 4, 7, 6, 12, 8, 15, 13, 18, 12, 28;


PROG

(Haskell)
import Data.List (inits)
a245093 n k = a245093_tabl !! (n1) !! (k1)
a245093_row n = a245093_tabl !! (n1)
a245093_tabl = tail $ inits $ a000203_list
 Reinhard Zumkeller, Dec 12 2015


CROSSREFS

Cf. A000203, A024916, A027293, A104765, A140207, A221529, A237270, A237593, A245099, A265652.
Sequence in context: A095709 A076152 A107638 * A104765 A308690 A329512
Adjacent sequences: A245090 A245091 A245092 * A245094 A245095 A245096


KEYWORD

nonn,tabl,look


AUTHOR

Omar E. Pol, Jul 15 2014


STATUS

approved



