A037286 Replace 2n+1 with concatenation of its divisors.

1, 13, 15, 17, 139, 111, 113, 13515, 117, 119, 13721, 123, 1525, 13927, 129, 131, 131133, 15735, 137, 131339, 141, 143, 13591545, 147, 1749, 131751, 153, 151155, 131957, 159, 161, 13792163, 151365, 167, 132369, 171, 173, 135152575, 171177

Offset

0,2

Links

Table of n, a(n) for n=0..38.

Example

Divisors of 15 are 1,3,5,15, so a(7)=13515

Crossrefs

Sequence in context: A068893 A079829 A096090 * A166533 A166534 A126727

Adjacent sequences: A037283 A037284 A037285 * A037287 A037288 A037289

Keyword

nonn,base,easy

Author

N. J. A. Sloane

Extensions

More terms from Erich Friedman

Status

approved