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A097365 Largest prime factor of A096421(n). 2
2, 2, 3, 3, 11, 7, 5, 7, 5, 43, 1093, 1453, 71, 13, 67, 661, 155191, 103, 2617, 3461, 420929, 1319, 1839833, 129917, 1531, 1316537, 91387, 40841, 30631, 49506559, 1176509, 262069, 14497151, 7489, 1860564731, 1053007, 4557398710937 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..39.

EXAMPLE

A096421(19) = 79457792 = 2^9 * 155191, so a(19) = 155191.

PROG

(PARI) {m=39; v=vector(m); v[1]=1; for(n=2, m, s=0; for(j=1, n-1, if(gcd(j, n)==1, s=s+v[j]*v[n-j])); v[n]=s); for(i=3, m, fac=factor(v[i]); print1(fac[matsize(fac)[1], 1], ", "))}

CROSSREFS

Cf. A096421, A097366.

Sequence in context: A095060 A319628 A094117 * A156906 A216245 A180000

Adjacent sequences:  A097362 A097363 A097364 * A097366 A097367 A097368

KEYWORD

nonn

AUTHOR

Klaus Brockhaus, Aug 09 2004

STATUS

approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)