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

Author

Parthasarathy Nambi, Feb 24 2005

Keywords

• nonn
• base

Examples

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

Links

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

Crossrefs

Cf. A024912.

Programs

Mathematica

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