A290439 a(n) = A289677(3*n+1).

0, 2, 4, 11, 22, 43, 85, 171, 366, 774, 1586, 3136, 6123, 12088, 24283, 49040, 99031, 200444, 405931

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: A018774 A102608 A356648 * A018259 A018480 A004646

Adjacent sequences: A290436 A290437 A290438 * A290440 A290441 A290442

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 02 2017

Status

approved