A236205 For k=2,3,...,10, read in decimal base-k representation of n. a(n) is the sum of numbers of divisors of all read numbers.

9, 20, 20, 33, 24, 42, 28, 48, 42, 38, 36, 60, 31, 63, 49, 64, 33, 88, 31, 66, 59, 58, 31, 98, 39, 58, 67, 80, 42, 79, 30, 100, 57, 56, 64, 145, 36, 76, 52, 88, 50, 146, 26, 102, 90, 53, 32, 132, 56, 80, 58, 81, 40, 140, 44, 136, 50, 67, 36, 120, 32, 64, 114

Offset: 1

Author

Vladimir Shevelev, Jan 20 2014

Keywords

• nonn
• base
• less

Comments

In particular, for prime n's we have a subsequence: 20,20,24,28,36,31,33,31,31,42,30,36,50,26,32,40,36,32,...

Crossrefs

Cf. A000005, A235354.

Extensions

More terms from Peter J. C. Moses, Jan 20 2014