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A180425
Number of positive integers below 10^n requiring 3 positive squares in their representation as sum of squares.
4
2, 42, 505, 5586, 59308, 616995, 6347878, 64875490, 660104281, 6695709182, 67762820595, 684596704482, 6907026402474, 69611115440126, 700946070114283, 7053023642205904
OFFSET
1,1
FORMULA
a(n) = #{k: A000419(k) < 10^n}.
A049416(n) + A180416(n) + a(n) + A167615(n) = A002283(n).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Martin Renner, Jan 19 2011
EXTENSIONS
a(6)=616995 by Lars Blomberg, May 03 2011
a(7)-a(10) from Donovan Johnson, Jul 01 2011
a(10) corrected and a(11)-a(16) from Hiroaki Yamanouchi, Jul 13 2014
STATUS
approved