A257245 - OEIS

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A257245

Odd bisection of A257244: a(n) = A257244(2n - 1).

2, 3, 3, 3, 3, 5, 5, 3, 3, 5, 7, 7, 7, 3, 19, 7, 5, 5, 7, 5, 19, 11, 13, 13, 23, 13, 11, 11, 61, 31, 13, 19, 43, 13, 7, 5, 61, 31, 23, 127, 7, 151, 19, 181, 13, 43, 31, 233, 13, 13, 7, 11, 19, 31, 59, 31, 31, 163, 41, 41, 113, 11, 19, 19, 409, 41, 41, 41, 19, 41, 113, 29, 167, 13, 17, 11, 179, 19, 19, 13, 5

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..2048

FORMULA

a(n) = A257244(2n - 1).

a(n) = A006530(A256393(2n - 1)). [Equally, the largest prime factor of A256393(2n-1).]

Other identities and observations:

For all n >= 1, a(n) >= A257246(n).

PROG

(Scheme, alternative definitions)