A080589 a(n) is smallest nonnegative integer which is consistent with sequence being monotonically increasing and satisfying a(a(n)) = 5n.

0, 2, 5, 6, 7, 10, 15, 20, 21, 22, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 40, 45, 46, 47, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 115, 120, 121, 122, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136

Offset: 0

Author

N. J. A. Sloane, Feb 23 2003

Keywords

• nonn
• easy

References

• J.-P. Allouche, N. Rampersad and J. Shallit, On integer sequences whose first iterates are linear, Aequationes Math. 69 (2005), 114-127

Links

• B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence, J. Integer Seqs., Vol. 6 (2003), #03.2.2.
• B. Cloitre, N. J. A. Sloane and M. J. Vandermast, Numerical analogues of Aronson's sequence (math.NT/0305308)
• Index entries for sequences of the a(a(n)) = 2n family

Crossrefs

Cf. A079351.

Extensions

More terms from Matthew Vandermast, Mar 01 2003