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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
OFFSET
1,1
LINKS
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: A203477 A339580 A374392 * A066751 A115886 A041439
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 31 2006
STATUS
approved