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A272171 Triangle read by rows: T(n,k) in which row n lists the first n terms of A000005 in reverse order. 2
1, 2, 1, 2, 2, 1, 3, 2, 2, 1, 2, 3, 2, 2, 1, 4, 2, 3, 2, 2, 1, 2, 4, 2, 3, 2, 2, 1, 4, 2, 4, 2, 3, 2, 2, 1, 3, 4, 2, 4, 2, 3, 2, 2, 1, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1, 6, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1, 2, 6, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1, 4, 2, 6, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(n) = A000005(A004736(n)).
T(n,k) = A000005(n-k+1).
EXAMPLE
Triangle begins:
1;
2, 1;
2, 2, 1;
3, 2, 2, 1;
2, 3, 2, 2, 1;
4, 2, 3, 2, 2, 1;
2, 4, 2, 3, 2, 2, 1;
4, 2, 4, 2, 3, 2, 2, 1;
3, 4, 2, 4, 2, 3, 2, 2, 1;
4, 3, 4, 2, 4, 2, 3, 2, 2, 1;
2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1;
6, 2, 4, 3, 4, 2, 4, 2, 3, 2, 2, 1;
...
CROSSREFS
Column k gives A000005 starting in row k.
Row sums give A006218, n >= 1.
Sequence in context: A205451 A227899 A208244 * A160696 A152545 A359538
KEYWORD
nonn,tabl
AUTHOR
Omar E. Pol, Apr 21 2016
STATUS
approved

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Last modified May 18 07:16 EDT 2024. Contains 372618 sequences. (Running on oeis4.)