

A226055


a(n) is the first common term in column n of tables A225630 and A225640, when scanned from the top to bottom.


7



1, 1, 2, 3, 4, 30, 6, 84, 120, 180, 210, 4620, 4620, 780, 360360, 360360, 240240, 92820, 12252240, 175560, 58198140, 116396280, 360360, 753480, 2677114440, 13385572200, 26771144400, 40156716600, 2677114440, 13665960, 2329089562800, 82990547640, 48134517631200
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OFFSET

0,3


COMMENTS

Consider an algorithm which finds a maximum value lcm(p1,p2,...,pk,prevmax) among all partitions {p1+p2+...+pk} of n, where the "seed number" prevmax is such a maximum value from the previous iteration.
a(n) gives the first identical value encountered, after repeated iterations, when starting from the initial seed value 1, and when starting from the initial seed value of n.
Equivalently, the first common term occurring on the row n of tables A225632 and A225642, when scanning the rows from the left. These are A225638(n)th and A225639(n)th terms from the beginning of each row, respectively.


LINKS



FORMULA



EXAMPLE

Row 8 of A225632 is 1, 15, 120, 840;
Their first common term from the left is 120, thus a(8)=120.


PROG

(Scheme):
(define (A226055 n) (A225640bi n (A225639 n))) ;; Alternative definition.
;; The Schemedefinitions of A225630bi and A225640bi given respectively in A225630 and A225640.


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



