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A126440 Triangular array read by rows: related to A053445 and A060351 with row sums A000142 (which counts permutations of n objects). 0
1, 0, 2, 0, 2, 4, 0, 3, 13, 8, 0, 4, 42, 58, 16, 0, 5, 118, 344, 221, 32 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

A060351 relates permutations to numeric partitions. Diagonal 1 2 4 8 16 32 ... A000079 sums triangle A007318 and is related to hook partitions. Diagonal 2 13 58 221 ... sums 2 10 34 98 ... related to partition 2+2 3 20 85 ... related to 3+3 4 33 ... related to 4+4 5 ... related to 5+5 etc.

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

The array begins

1

0 2

0 2 4

0 3 13 8

0 4 42 58 16

0 5 118 344 221 32

CROSSREFS

Cf. A000041 A000142 A053445 A059797 A060351 A091307.

Sequence in context: A115273 A194759 A209697 * A131186 A137312 A137320

Adjacent sequences:  A126437 A126438 A126439 * A126441 A126442 A126443

KEYWORD

nonn,tabl

AUTHOR

Alford Arnold, Jan 13 2007

STATUS

approved

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Last modified April 21 12:24 EDT 2021. Contains 343150 sequences. (Running on oeis4.)