A211002 Numbers congruent to 3 in the structure (or curve) of A211000.

3, 15, 31, 35, 43, 47, 51, 151, 155, 175, 179, 243, 247, 251, 255, 339, 343, 347, 355, 359, 363, 367, 371, 391, 395, 403, 407, 6571, 6575, 6583, 6587, 6591, 6595, 6599, 6603, 6607, 6611, 6615, 6619, 6623, 6627, 6631, 6635, 6655, 6659, 6675, 6679, 6683, 6687

Offset

1,1

Comments

The behavior seems to be as modular arithmetic but in a growing structure. For n >= 13 the structure is essentially a column of tangent circles of radius 1.

Links

Table of n, a(n) for n=1..49.

Crossrefs

Cf. A211000, A211001, A211003, A211010, A211011, A211020-211023.

Sequence in context: A290069 A289936 A289970 * A031039 A358804 A152813

Adjacent sequences: A210999 A211000 A211001 * A211003 A211004 A211005

Keyword

nonn

Author

Omar E. Pol, Mar 30 2012

Status

approved