A102546 Numbers t such that t1 is prime and t is a multiple of 10.

10, 40, 60, 70, 120, 130, 160, 180, 190, 280, 300, 330, 370, 400, 420, 480, 510, 550, 570, 580, 610, 630, 670, 700, 790, 810, 850, 900, 960, 990, 1030, 1050, 1060, 1170, 1180, 1210, 1230, 1240, 1260, 1300, 1390, 1440, 1510, 1540, 1560, 1590, 1600, 1630, 1690, 1740, 1830, 1840, 1870

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Example

If t=10, then t1 = 101 (prime).
If t=180, then t1 = 1801 (prime).
If t=420, then t1 = 4201 (prime).

Mathematica

Select[10*Range[200], PrimeQ[10#+1]&] (* Harvey P. Dale, Jan 10 2017 *)

Crossrefs

Cf. A024912.

Sequence in context: A306413 A187205 A104045 * A352777 A108777 A000132

Adjacent sequences: A102543 A102544 A102545 * A102547 A102548 A102549

Keyword

nonn,base

Author

Parthasarathy Nambi, Feb 24 2005

Status

approved