1,3

N. J. A. Sloane, Table of n, a(n) for n = 1..81

Factored forms are 0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2^4, 2^5, 2^6, 2^7, 2^8, 2^9, 3^6, 3^7, 3^8, 3^9, 2^16, 2^18, 5^8, 5^9, 2^9*3^9, 7^9, 2^27, 3^18, 2^27*3, 2^29, 2^27*5, 2^28*3, 2^27*7, 2^30, 2^27*3^2, 2^2*3^18, 3^18*5,

2*3^19, 3^18*7, 2^3*3^18, 3^20, 2^4*3^18, 2^5*3^18, 2^6*3^18, 2^7*3^18, 2^8*3^18, 2^9*3^18, 3^24, 2^27*3^7, 3^25, 2^27*3^8, 3^26, 2^27*3^9, 3^27, 2^43, 2^16*3^18, 2^45, 2^18*3^18, 3^18*5^8, 2^27*5^9, ...

M:=100000; t1:=[]; t2:=[]; rec:=-1; for n from 0 to M do m:=powertrain(n); if m > rec then rec:=m; t1:=[op(t1), m]; t2:=[op(t2), n]; fi; od: lprint(t1); lprint(t2);

Cf. A133500, A133505.

Adjacent sequences: A133501 A133502 A133503 this_sequence A133505 A133506 A133507

Sequence in context: A133059 A132722 A048407 this_sequence A108971 A124359 A124366

nonn

J. H. Conway and njas, Dec 03 2007