A085961 Sigma of the least numbers k for which sigma is divisible by k (where sigma is the sum of the divisors of k, A000203(k)).

1, 4, 3, 4, 15, 6, 7, 8, 18, 20, 44, 12, 13, 28, 15, 32, 68, 18, 38, 20, 42, 44, 138, 24, 150, 78, 54, 28, 174, 60, 31, 32, 132, 68, 140, 36, 74, 38, 39, 40, 164, 42, 258, 44, 90, 138, 282, 48, 98, 150, 102, 104, 212, 54, 110, 56, 57, 174, 354, 60, 183, 124, 63, 128, 195

Offset

1,2

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

a(n) = A000203(A070982(n)).

Crossrefs

Cf. A070982, A000203, A066678.

Sequence in context: A353830 A060374 A074296 * A175325 A223525 A205446

Adjacent sequences: A085958 A085959 A085960 * A085962 A085963 A085964

Keyword

nonn

Author

Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 17 2003

Extensions

More terms from John W. Layman, Aug 19 2003

Status

approved