A211001 Numbers congruent to 2 in the structure of A211000.

2, 34, 42, 50, 150, 242, 246, 250, 354, 358, 370, 390, 394, 402, 406, 6570, 6602, 6606, 6622, 6626, 6630, 6634, 6654, 6658, 6682, 6686

Offset

1,1

Comments

The behavior seems to be as modular arithmetic but in a growing structure. The structure of A211000 looks like essentially a column of tangent circles of radius 1. The structure arises from the prime numbers A000040. For the number of circles at n-th stage see A211020.

Links

Table of n, a(n) for n=1..26.

Crossrefs

Cf. A187210, A210838, A210841, A211000, A211002, A211003, A211010, A211011, A211020-A211023.

Sequence in context: A123606 A062864 A249487 * A124208 A077310 A177051

Adjacent sequences: A210998 A210999 A211000 * A211002 A211003 A211004

Keyword

nonn,more

Author

Omar E. Pol, Mar 30 2012

Status

approved