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A082992 Primes whose 10's complement is a triangular number. 1
7, 79, 97, 139, 439, 769, 829, 997, 1999, 3559, 6679, 6997, 7789, 9439, 9649, 9769, 9829, 20599, 25309, 32839, 34297, 36097, 42709, 44389, 49279, 49597, 56929, 64489, 65809, 72739, 76129, 79699, 82609, 84247, 86959, 89269, 89989, 90547, 93097 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..250

MATHEMATICA

tctnQ[n_]:=Module[{c=1+FromDigits[9-IntegerDigits[n]]}, IntegerQ[ (Sqrt[8c+1]-1)/2]]; Select[Prime[Range[10000]], tctnQ] (* Harvey P. Dale, Sep 21 2012 *)

CROSSREFS

Sequence in context: A280518 A156714 A106110 * A261181 A106107 A020471

Adjacent sequences:  A082989 A082990 A082991 * A082993 A082994 A082995

KEYWORD

nonn,base

AUTHOR

Jason Earls, May 31 2003

STATUS

approved

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Last modified September 24 22:33 EDT 2021. Contains 347651 sequences. (Running on oeis4.)