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A160648 Second differences of sequence A160644. +0
2
0, 1, 0, 0, 2, 0, 1, 4, 2, 3, 9, 6, 11, 19 (list; graph; listen)
OFFSET

1,5

COMMENT

A160644 bisects sequence A053445 which counts unrestricted partitions such

that the two largest values match and that no part is less than two.

Conjecture: a(n) counts unrestricted partitions of even numbers such that

the three largest values match and that, after "222", no part is less than three.

EXAMPLE

a(n) begins 0 1 0 0 2 0 1 4 2 3 9 ... and counts 222; 444,3333;

666,5553,444433,333333; 5555,44444; 6664,55543,444433;

888,6666,7773,55554,66633,444444,555333,4443333,33333333; ...

CROSSREFS

A000041 A002865 A053445 A160644 A160646

Sequence in context: A158239 A159819 A030188 this_sequence A124912 A138752 A098689

Adjacent sequences: A160645 A160646 A160647 this_sequence A160649 A160650 A160651

KEYWORD

easy,more,nonn

AUTHOR

Alford Arnold (Alford1940(AT)aol.com), May 25 2009

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.


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