|
%I #20 Nov 23 2019 04:05:49
%S 1,2,5,12,21,39,73,118,198,326,510,797,1234,1854,2778,4122,6014,8717,
%T 12550,17849,25252,35486,49447,68540,94480,129378,176339,239165,
%U 322676,433487,579907,772318,1024691,1354445,1783504
%N Number of parts of the n-th subshell of the head of the last section of the set of partitions of any odd integer >= 2n+1.
%C The last section of the set of partitions of 2n+1 contains n subshells.
%C Also first differences of A182735. - _Omar E. Pol_, Mar 03 2011
%F a(n) = A138135(2n+1) - A138135(2n-1).
%e a(5)=21 because the 5th subshell of the head of the last section of any odd integer >= 11 looks like this:
%e (11 . . . . . . . . . . )
%e ( 6 . . . . . 5 . . . . )
%e ( 7 . . . . . . 4 . . . )
%e ( 8 . . . . . . . 3 . . )
%e ( 4 . . . 4 . . . 3 . . )
%e ( 5 . . . . 3 . . 3 . . )
%e . (2 . )
%e . (2 . )
%e . (2 . )
%e . (2 . )
%e . (2 . )
%e . (2 . )
%e . (2 . )
%e . (2 . )
%e The subshell has 21 parts, so a(5)=21.
%Y Cf. A135010, A138135, A182735, A182743, A182983, A182992, A182995.
%K nonn
%O 1,2
%A _Omar E. Pol_, Feb 06 2011
%E More terms from _Omar E. Pol_, Mar 03 2011
|
