A046709 Irrational unitary phi amicable number: numbers b such that uphi(a) = uphi(b) = 2*(a^2-b^2)^(1/2) where uphi = A047994.

25200, 982800, 1562400, 5358990, 6854400, 60933600, 267321600, 450964684800, 798939187200, 17587622707200, 31158628300800, 118216784402841600, 459775632811622400, 1936908127288531353600, 75539416964252722790400

Offset

1,1

Comments

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, ...

Warning: sequence data may be incomplete beyond 267321600. - Sean A. Irvine, Apr 20 2021

Links

Table of n, a(n) for n=1..15.

Crossrefs

Cf. A046710, A047994.

Sequence in context: A296097 A076583 A226501 * A179723 A174825 A269041

Adjacent sequences: A046706 A046707 A046708 * A046710 A046711 A046712

Keyword

nonn

Author

Yasutoshi Kohmoto

Extensions

Missing term inserted, terms sorted, and general revision by Sean A. Irvine, Apr 20 2021

Status

approved