A115704 Triangular numbers whose digit reversal is prime; trailing zeros are permitted.

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

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