A290436 a(n) = A289676(3*n+1).

2, 2, 4, 5, 10, 21, 43, 85, 146, 250, 462, 960, 2069, 4296, 8485, 16496, 32041, 61700, 118357

Offset

0,1

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: A238020 A095020 A340775 * A338048 A127825 A185100

Adjacent sequences: A290433 A290434 A290435 * A290437 A290438 A290439

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 02 2017

Status

approved