OFFSET
1,1
EXAMPLE
a(1)=1596165317111770183018911953 because 1596165317111770183018911953 is the prime formed by concatenation of 7 consecutive triangular numbers i.e. 1596,1653,1711,1770,1830,1891 and 1953.
MATHEMATICA
Select[FromDigits[Flatten[IntegerDigits[#]]]&/@ Partition[Accumulate[Range[ 2000]], 7, 1], PrimeQ] (* Harvey P. Dale, Mar 17 2013 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Apr 25 2005
EXTENSIONS
More terms from Harvey P. Dale, Mar 17 2013
STATUS
approved