# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a046709 Showing 1-1 of 1 %I A046709 #7 Apr 20 2021 22:57:15 %S A046709 25200,982800,1562400,5358990,6854400,60933600,267321600,450964684800, %T A046709 798939187200,17587622707200,31158628300800,118216784402841600, %U A046709 459775632811622400,1936908127288531353600,75539416964252722790400 %N A046709 Irrational unitary phi amicable number: numbers b such that uphi(a) = uphi(b) = 2*(a^2-b^2)^(1/2) where uphi = A047994. %C A046709 Factorizations: 2^4*3^2*5^2*7, 2^4*3^3*13*5^2*7, 2^5*3^2*31*5^2*7, 2*3*5*7*13^2*151, 2^5*3^3*13*31*5^2*7, ... %C A046709 Warning: sequence data may be incomplete beyond 267321600. - _Sean A. Irvine_, Apr 20 2021 %Y A046709 Cf. A046710, A047994. %K A046709 nonn %O A046709 1,1 %A A046709 _Yasutoshi Kohmoto_ %E A046709 Missing term inserted, terms sorted, and general revision by _Sean A. Irvine_, Apr 20 2021 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE