"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

1,1

Table of n, a(n) for n=1..3.

2421 is in the sequence because prime(2)^2 + prime(4)^2 + prime(2)^2 + prime(1)^1 = 3^2 + 7^4 + 3^2 + 2^1 = 2421.

Sequence in context: A237940 A097030 A204367 * A254901 A254908 A257203

Adjacent sequences: A131756 A131757 A131758 * A131760 A131761 A131762

fini,full,nonn,base,bref

Tanya Khovanova and Alexey Radul, Sep 17 2007

approved