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A290438 a(n) = A289676(3*n). 0
1, 1, 3, 3, 12, 20, 39, 64, 116, 210, 438, 966, 2089, 4155, 8032, 15657, 30325, 58379, 112885 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

No formulas or recurrences are known for the important sequences A289670 and A289671. The essence of these two sequences is captured in the six entries A290436-A290441. Any numerical properties of these would be most welcome.

LINKS

Table of n, a(n) for n=1..19.

CROSSREFS

Cf. A284116, A284119, A284121, A289670-A289677, A290436-A290441.

Sequence in context: A075780 A292515 A078666 * A006804 A052533 A268798

Adjacent sequences:  A290435 A290436 A290437 * A290439 A290440 A290441

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Aug 02 2017

STATUS

approved

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Last modified May 25 20:58 EDT 2020. Contains 334597 sequences. (Running on oeis4.)