A217590 Values in A091579 that need to be smoothed in order to produce A091588.

4, 9, 25, 68, 196, 581, 1731, 5180, 15534, 46579, 139713, 419116, 1257320

Offset: 1

Author

N. J. A. Sloane, Mar 18 2013

Keywords

• nonn
• more

Comments

a(n) = A091588(n) + 1 for n >= 1.

Each term is roughly 3 times the previous term.

Links

• F. J. van de Bult, D. C. Gijswijt, J. P. Linderman, N. J. A. Sloane and Allan Wilks, A Slow-Growing Sequence Defined by an Unusual Recurrence, J. Integer Sequences, Vol. 10 (2007), #07.1.2. See Eq. (28).
• F. J. van de Bult, D. C. Gijswijt, J. P. Linderman, N. J. A. Sloane and Allan Wilks, A Slow-Growing Sequence Defined by an Unusual Recurrence [pdf, ps]. See Eq. (28).
• Index entries for sequences related to Gijswijt's sequence

Crossrefs

Cf. A090822, A091579, A091587, A091588.

Formula

I would very much like a formula for this sequence!