0,1

Table of n, a(n) for n=0..29.

The number of divisors of 24 is 8 - which is the second term.

The number of divisors of 246 is 8 - which is the third term.

The number of divisors of 2468 is 6 - which is the fourth term.

Table[DivisorSigma[0, FromDigits[Flatten[IntegerDigits/@(2Range[n])]]], {n, 30}] (* Harvey P. Dale, Dec 10 2016 *)

Sequence in context: A198367 A021780 A020769 * A178247 A048651 A243596

Adjacent sequences: A105385 A105386 A105387 * A105389 A105390 A105391

base,nonn

Parthasarathy Nambi, Apr 30 2005

More terms from Harvey P. Dale, Dec 10 2016

approved