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A290437 a(n) = A289676(3*n+2). 0
1, 2, 4, 4, 13, 18, 40, 71, 132, 231, 459, 990, 2114, 4237, 8234, 16054, 31280, 60252, 115810 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

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=0..18.

CROSSREFS

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

Sequence in context: A129017 A086915 A059927 * A154987 A089419 A263023

Adjacent sequences:  A290434 A290435 A290436 * A290438 A290439 A290440

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Aug 02 2017

STATUS

approved

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Last modified June 6 04:15 EDT 2020. Contains 334859 sequences. (Running on oeis4.)