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A039595 Fibonacci numbers that are also triangular numbers. +0
1
1, 3, 21, 55 (list; graph; listen)
OFFSET

1,2
REFERENCES

D. Wells, Curious and interesting numbers, Penguin Books, p. 108

CROSSREFS

Cf. A000045, A000217.

Sequence in context: A056377 A034186 A027499 this_sequence A033567 A129212 A117984

Adjacent sequences: A039592 A039593 A039594 this_sequence A039596 A039597 A039598

KEYWORD

fini,nonn,full

AUTHOR

Felice Russo (felice.russo(AT)katamail.com)

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Last modified July 19 08:04 EDT 2008. Contains 142098 sequences.

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