

A077048


Doubly restricted composition numbers: number of compositions of [n^2/2] into up to n positive integers each no more than n.


3



1, 1, 2, 6, 44, 350, 4292, 57036, 996088, 18661152, 424241102, 10266964015, 287927722315, 8541887839459, 285144784116376, 10016752944160536, 388044155110294856, 15749295719801313452, 694726457246902921502
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OFFSET

0,3


LINKS

Table of n, a(n) for n=0..18.
Index entries for sequences related to compositions


FORMULA

Similar in magnitude to A077045.


EXAMPLE

a(3)=6 since the number of compositions of [3^2/2]=4 into up to 3 positive integers each no more than 3 are: 1+1+2, 1+2+1, 1+3, 2+1+1, 2+2, 3+1.


CROSSREFS

Cf. A029895, A077045, A077046, A077047.
Sequence in context: A319112 A342986 A136589 * A277479 A120594 A038180
Adjacent sequences: A077045 A077046 A077047 * A077049 A077050 A077051


KEYWORD

nonn


AUTHOR

Henry Bottomley, Oct 22 2002


STATUS

approved



