A147594 a(1)=1, a(n)= sigma_0 (n+a(n-1)).

1, 2, 2, 4, 3, 3, 4, 6, 4, 4, 4, 5, 6, 6, 4, 6, 2, 6, 3, 2, 2, 8, 2, 4, 2, 6, 4, 6, 4, 4, 4, 9, 8, 8, 2, 4, 2, 8, 2, 8, 3, 6, 3, 2, 2, 10, 4, 6, 4, 8, 2, 8, 2, 8, 6, 4, 2, 12, 2, 4, 4, 8, 2, 8, 2, 6, 2, 8, 4, 4, 6, 8, 5, 2, 4, 10, 4, 4, 2, 4, 4, 4, 4, 8, 4

Offset

1,2

Comments

a(n)=A000005(n+a(n-1)).

Links

Table of n, a(n) for n=1..85.

Mathematica

RecurrenceTable[{a[1]==1, a[n]==DivisorSigma[0, n+a[n-1]]}, a, {n, 20}] (* Harvey P. Dale, Apr 25 2016 *)

Crossrefs

Cf. A000005

Sequence in context: A154417 A292421 A205563 * A305425 A212652 A303691

Adjacent sequences: A147591 A147592 A147593 * A147595 A147596 A147597

Keyword

easy,nonn

Author

Ctibor O. Zizka, Nov 08 2008

Extensions

More terms from Harvey P. Dale, Apr 25 2016

Status

approved