A158897 The elements of A059100 at indices of triangular numbers, padded with zeros.

6, 0, 11, 0, 0, 18, 0, 0, 0, 27, 0, 0, 0, 0, 38, 0, 0, 0, 0, 0, 51, 0, 0, 0, 0, 0, 0, 66, 0, 0, 0, 0, 0, 0, 0, 83, 0, 0, 0, 0, 0, 0, 0, 0, 102, 0, 0, 0, 0, 0, 0, 0, 0, 0, 123, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 146, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 171, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 198, 0, 0, 0, 0, 0, 0

Offset

1,1

Links

Table of n, a(n) for n=1..97.

Formula

a(t)=A059100(i+1) if t=A000217(i), else a(t)=0.

a(n)=A141620(n-1)+A158405(n+1).

Crossrefs

Cf. A144396.

Sequence in context: A117006 A294345 A073764 * A033458 A068308 A028651

Adjacent sequences: A158894 A158895 A158896 * A158898 A158899 A158900

Keyword

nonn

Author

Paul Curtz, Mar 29 2009

Extensions

Edited and extended by R. J. Mathar, Apr 04 2009

Status

approved