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A036067
A summarize Fibonacci sequence starting with a(0)=a(1)=0: summarize the previous two terms!.
1
0, 0, 20, 1220, 321120, 13423120, 1433424120, 4443424120, 8433423120, 187443422120, 28175443523120, 2827255433624120, 282716454443823120, 382726356443923120, 19382736256463823120, 29382756253483823120
OFFSET
0,3
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.
Sequence in context: A042745 A363054 A158912 * A294191 A359645 A001451
KEYWORD
base,easy,nice,nonn
STATUS
approved