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A115704 Triangular numbers whose digit reversal is prime; trailing zeros are permitted. 2
3, 91, 136, 300, 325, 703, 1081, 1378, 1711, 3160, 3655, 7750, 9730, 11026, 11476, 12880, 13861, 18145, 18721, 19900, 36046, 70876, 75466, 76636, 79003, 90100, 92665, 99235, 107416, 108811, 110215, 113050, 118828, 123256, 130816, 137026 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

703=T(73) and 307 is prime.

MATHEMATICA

Select[Accumulate[Range[600]], PrimeQ[FromDigits[ Reverse[ IntegerDigits[ #]]]]&] (* Harvey P. Dale, Sep 30 2015 *)

CROSSREFS

Cf. A115705.

Sequence in context: A218143 A203477 A339580 * A066751 A115886 A041439

Adjacent sequences:  A115701 A115702 A115703 * A115705 A115706 A115707

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 31 2006

STATUS

approved

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Last modified October 25 07:16 EDT 2021. Contains 348239 sequences. (Running on oeis4.)