A036067 A summarize Fibonacci sequence starting with a(0)=a(1)=0: summarize the previous two terms!.

0, 0, 20, 1220, 321120, 13423120, 1433424120, 4443424120, 8433423120, 187443422120, 28175443523120, 2827255433624120, 282716454443823120, 382726356443923120, 19382736256463823120, 29382756253483823120

Offset: 0

Author

Floor van Lamoen

Keywords

• base
• easy
• nice
• nonn

Comments

From the 54th term the sequence goes into a cycle of 117 terms.

For n > 1, a(n) is of the form 2^(k+2) * 5 * r, where k is a nonnegative integer and r is a positive integer relatively prime to 10. Therefore, for n > 1, a(n) is a Zumkeller number (A083207). - Ivan N. Ianakiev, Mar 19 2020

Crossrefs

Cf. A036059.