A074284 Sum of the aliquot divisors of n-th triangular number.

0, 1, 6, 8, 9, 11, 28, 55, 33, 17, 78, 90, 21, 87, 240, 134, 81, 89, 170, 366, 153, 35, 396, 568, 109, 209, 582, 314, 285, 303, 496, 960, 303, 269, 1242, 816, 57, 379, 1572, 944, 483, 505, 638, 1818, 837, 71, 1752, 2244, 542, 957, 1698, 890, 729, 1395, 2492, 2884

Offset

1,3

Links

T. D. Noe, Table of n, a(n) for n=1..1000

Example

a(6)=11 because sum of aliquot divisors of 6th triangular number(i.e. 21) is 1+3+7=11.

Crossrefs

Sequence in context: A025070 A123704 A045574 * A125736 A030725 A195101

Adjacent sequences: A074281 A074282 A074283 * A074285 A074286 A074287

Keyword

nonn

Author

Shyam Sunder Gupta, Sep 21 2002

Status

approved