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A107835 Slowest increasing sequence where a(n)-(first digit of a(n)) is prime. 1
12, 14, 18, 21, 25, 32, 34, 41, 45, 47, 52, 58, 65, 67, 74, 78, 81, 87, 92, 98, 102, 104, 108, 110, 114, 128, 132, 138, 140, 150, 152, 158, 164, 168, 174, 180, 182, 192, 194, 198, 201, 213, 225, 229, 231, 235, 241, 243, 253, 259, 265, 271, 273, 279, 283, 285 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..56.

EXAMPLE

12 - 1 = 11, which is prime; 14 - 1 = 13, which is prime; 18 - 1 = 17, which is prime; 21 - 2 = 19, which is prime; 25 - 2 = 23, which is prime; etc.

MATHEMATICA

Select[ Range[300], PrimeQ[ # - IntegerDigits[ # ][[1]]] &] (* Robert G. Wilson v, Jun 14 2005 *)

CROSSREFS

Cf. A107836.

Sequence in context: A135770 A091989 A078417 * A257966 A255842 A229966

Adjacent sequences:  A107832 A107833 A107834 * A107836 A107837 A107838

KEYWORD

base,easy,nonn

AUTHOR

Eric Angelini, Jun 11 2005

EXTENSIONS

Edited, corrected and extended by Robert G. Wilson v, Jun 14 2005

STATUS

approved

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Last modified December 15 20:00 EST 2019. Contains 330000 sequences. (Running on oeis4.)