A285335 - OEIS

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A285335

Odd bisection of A048675 divided by two: a(n) = A048675((2*n)-1)/2.

0, 1, 2, 4, 2, 8, 16, 3, 32, 64, 5, 128, 4, 3, 256, 512, 9, 6, 1024, 17, 2048, 4096, 4, 8192, 8, 33, 16384, 10, 65, 32768, 65536, 6, 18, 131072, 129, 262144, 524288, 5, 12, 1048576, 4, 2097152, 34, 257, 4194304, 20, 513, 66, 8388608, 10, 16777216, 33554432, 7, 67108864, 134217728, 1025, 268435456, 130, 18, 36, 16, 2049, 6

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

OFFSET

1,3

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..1024

FORMULA

a(n) = A048675((2*n)-1)/2.

a(n) = A048675(A064216(n)).

PROG

(PARI)

A048675(n) = { my(f = factor(n)); sum(k=1, #f~, f[k, 2]*2^primepi(f[k, 1]))/2; }; \\ After Michel Marcus

A285335(n) = A048675((2*n)-1)/2;